Log in

Relevant bibliographies by topics / Mesocosmo / Journal articles

To see the other types of publications on this topic, follow the link: Mesocosmo.

Journal articles on the topic 'Mesocosmo'

Author: Grafiati

Published: 4 June 2021

Last updated: 13 February 2022

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'Mesocosmo.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

Martins, A. T., and R. A. Pitelli. "Efeitos do manejo de Eichhornia crassipes sobre a qualidade da água em condições de mesocosmos." Planta Daninha 23, no. 2 (2005): 233–42. http://dx.doi.org/10.1590/s0100-83582005000200009.

Full text

Abstract:

As macrófitas, apesar da enorme importância na dinâmica do ambiente aquático, quando formam extensas e densas colonizações, promovem uma série de prejuízos ao ambiente e aos usos múltiplos dos reservatórios. Nessas situações, há necessidade de redução de seu tamanho populacional, seja reduzindo as condições favoráveis ao crescimento, seja por meio do controle direto das plantas. Dentre as macrófitas aquáticas que promovem esses tipos de problema, o aguapé (Eichhornia crassipes) é considerada a mais importante. Seu controle é praticado em todo o mundo. O diquat tem sido bastante utilizado para

APA, Harvard, Vancouver, ISO, and other styles

2

Lawrence, J. R., and M. J. Hendry. "Mesocosms for Subsurface Research." Water Quality Research Journal 30, no. 3 (1995): 493–512. http://dx.doi.org/10.2166/wqrj.1995.039.

Full text

Abstract:

Abstract This article provides an overview of mesocosm research applied to investigations of subsurface processes. The nature of mesocosms and the mesocosm concept are defined and discussed as are the advantages and disadvantages of these systems. In general, a mesocosm meets the requirements of being of sufficient size to contain all the components of interest while permitting “natural” behaviour. It is implicit in the use of mesocosms that they act as a surrogate for the real ecosystem. However, the precise size of a mesocosm is difficult to define without a specific context. Details are pro

APA, Harvard, Vancouver, ISO, and other styles

3

Ferriol, Carmen, Maria Rosa Miracle, and Eduardo Vicente. "Effects of nutrient addition, recovery thereafter and the role of macrophytes in nutrient dynamics of a Mediterranean shallow lake: a mesocosm experiment." Marine and Freshwater Research 68, no. 3 (2017): 506. http://dx.doi.org/10.1071/mf15291.

Full text

Abstract:

Eutrophication in coastal wetlands has increased greatly because of human impact, reducing water quality and affecting aquatic plants. The aim of the present study was to investigate the eutrophication of Mediterranean wetlands and their possible recovery. An in situ mesocosm nutrient enrichment experiment was performed in a coastal shallow lake from eastern Spain, holding dense Chara meadows. In this lake, 36 mesocosms were installed and fertilised weekly with four levels of N and P addition over an 8-week period from June to August. Mesocosms fertilised with the two higher levels (N:P ≥5:0.5

APA, Harvard, Vancouver, ISO, and other styles

4

Cruz, Claudinei da, João Henrique Corti Cervoni, Adilson Ferreira Silva, Nathalia Garlich, and Robinson Antonio Pitelli. "APLICAÇÃO SEQUENCIAL DE GLYPHOSATE EM PLANTAS AQUÁTICAS DE DIFÍCIL CONTROLE EM CONDIÇÃO DE MESOCOSMO." Ciência e cultura (Barretos) 13, no. 2 (2017): 59–63. http://dx.doi.org/10.4322/1980-0029.132017.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

Yang, L., and C. C. Hu. "Treatments of oil-refinery and steel-mill wastewaters by mesocosm constructed wetland systems." Water Science and Technology 51, no. 9 (2005): 157–64. http://dx.doi.org/10.2166/wst.2005.0309.

Full text

Abstract:

In this study, two types of industrial wastewater, oil-refining and steel-milling, were selected for investigating their feasibility of treatment by mesocosm constructed wetland systems. The secondly treated effluents from the wastewater treatment plants were directly discharged into the systems controlled at different flow rates. Three wetland mesocosms were installed in the two industries: mesocosms A and B were in the oil refinery, and mesocosm C was in the steel mill. The substratum media used in wetland systems were sand (mesocosm A) and gravel (mesocosms B and C), while the vegetation ty

APA, Harvard, Vancouver, ISO, and other styles

6

Maria, Marina Andrada, Liséte Celina Lange, Samuel Rodrigues Castro, Rose Lílian Miranda, and Mônica Alves Mamão. "Efeito do Herbicida Roundup Original® a base de glifosato em organismos não alvo utilizando modelo mesocosmo." Revista em Agronegócio e Meio Ambiente 13, no. 1 (2020): 279–300. http://dx.doi.org/10.17765/2176-9168.2020v13n1p279-300.

Full text

Abstract:

Foram criados mesocosmos de lagoa para avaliação do efeito de glifosato a organismos não alvo, quando utilizado para o controle de Eichhornia crassipes (Mart.) Solms (1883) e Salvinia sp., macrófitas aquáticas flutuantes. Foi utilizada a formulação comercial Roundup Original®. Avaliou-se o efeito sobre bactérias por meio de ensaios de determinação de coliformes totais, Escherichia coli e contagem de bactérias heterotróficas; sobre fitoplâncton e perifíton; e sobre caramujos e peixes. Ocorreram flutuações na comunidade bacteriana com rápido reestabelecimento, sem consequências consideráveis par

APA, Harvard, Vancouver, ISO, and other styles

7

McHenry, J., and A. Werker. "In-situ monitoring of microbial biomass in wetland mesocosms." Water Science and Technology 51, no. 9 (2005): 233–41. http://dx.doi.org/10.2166/wst.2005.0326.

Full text

Abstract:

The objective of the present investigation has been to combine tracer principles and a hydrolytic microbial activity assay using fluorescein diacetate to monitor changes in microbial biomass within subsurface flow wetland mesocosms. The mesocosm hydrolytic activity was referenced to activated sludge concentrations treating a typical domestic wastewater at full scale. Microbial biomass activity levels within four laboratory wetland mesocosms treating a synthetic domestic wastewater were routinely monitored over a 21-week period of plant growth and rhizosphere development. Although above ground

APA, Harvard, Vancouver, ISO, and other styles

8

Roy, A. S., S. M. Gibbons, H. Schunck, et al. "Ocean acidification shows negligible impacts on high-latitude bacterial community structure in coastal pelagic mesocosms." Biogeosciences Discussions 9, no. 9 (2012): 13319–49. http://dx.doi.org/10.5194/bgd-9-13319-2012.

Full text

Abstract:

Abstract. The impact of ocean acidification and carbonation on microbial community structure was assessed during a large-scale in situ costal pelagic mesocosm study, included as part of the EPOCA 2010 Arctic campaign. The mesocosm experiment included ambient conditions (fjord) and nine mesocosms, with pCO2 range from ~145 to ~1420 μatm. Samples collected at nine time points (t-1, t1, t5, t7, t12, t14, t22, t26 to t28) in seven treatments (ambient fjord (~145), 2×~185, ~270, ~685, ~820, ~1050 μatm) were analysed for "free-living" and "particle associated" microbial community composition using 1

APA, Harvard, Vancouver, ISO, and other styles

9

Aceves, Alison K., Paul D. Johnson, Carla L. Atkinson, Brian C. van Ee, Stephen A. Bullard, and Cova R. Arias. "Digestive gland microbiome of Pleurobema cordatum: mesocosms induce dysbiosis." Journal of Molluscan Studies 86, no. 4 (2020): 280–89. http://dx.doi.org/10.1093/mollus/eyaa024.

Full text

Abstract:

ABSTRACT Herein, we characterized the digestive gland (‘gut’) bacterial community (microbiome) of the Ohio pigtoe, Pleurobema cordatum (Rafinesque, 1820), using 16S rRNA gene sequencing. Two populations were compared: wild P. cordatum (n = 5) from the Tennessee River and P. cordatum (n = 9) relocated to artificial mesocosms and exposed to various thermal regimes for 2 weeks. We also characterized the bacterial communities from the habitat (water and sediment) of these wild and mesocosm-held populations. The gut microbiome of wild P. cordatum was dominated by members of the bacterial phylum Ten

APA, Harvard, Vancouver, ISO, and other styles

10

Schwier, Allison N., Karine Sellegri, Sébastien Mas, et al. "Primary marine aerosol physical flux and chemical composition during a nutrient enrichment experiment in mesocosms in the Mediterranean Sea." Atmospheric Chemistry and Physics 17, no. 23 (2017): 14645–60. http://dx.doi.org/10.5194/acp-17-14645-2017.

Full text

Abstract:

Abstract. While primary marine aerosol (PMA) is an important part of global aerosol total emissions, its chemical composition and physical flux as a function of the biogeochemical properties of the seawater still remain highly uncharacterized due to the multiplicity of physical, chemical and biological parameters that are involved in the emission process. Here, two nutrient-enriched mesocosms and one control mesocosm, both filled with Mediterranean seawater, were studied over a 3-week period. PMA generated from the mesocosm waters were characterized in term of chemical composition, size distri

APA, Harvard, Vancouver, ISO, and other styles

11

Riebesell, U., J. Czerny, K. von Bröckel, et al. "Technical Note: A mobile sea-going mesocosm system – new opportunities for ocean change research." Biogeosciences 10, no. 3 (2013): 1835–47. http://dx.doi.org/10.5194/bg-10-1835-2013.

Full text

Abstract:

Abstract. One of the great challenges in ocean change research is to understand and forecast the effects of environmental changes on pelagic communities and the associated impacts on biogeochemical cycling. Mesocosms, experimental enclosures designed to approximate natural conditions, and in which environmental factors can be manipulated and closely monitored, provide a powerful tool to close the gap between small-scale laboratory experiments and observational and correlative approaches applied in field surveys. Existing pelagic mesocosm systems are stationary and/or restricted to well-protect

APA, Harvard, Vancouver, ISO, and other styles

12

Riebesell, U., J. Czerny, K. von Bröckel, et al. "Technical Note: A mobile sea-going mesocosm system – new opportunities for ocean change research." Biogeosciences Discussions 9, no. 9 (2012): 12985–3017. http://dx.doi.org/10.5194/bgd-9-12985-2012.

Full text

Abstract:

Abstract. One of the great challenges in ocean change research is to understand and forecast the effects of environmental changes on pelagic communities and the associated impacts on biogeochemical cycling. Mesocosms, experimental enclosures designed to approximate natural conditions, and in which environmental factors can be manipulated and closely monitored, provide a powerful tool to close the gap between single species laboratory experiments and observational and correlative approaches applied in field surveys. Existing pelagic mesocosm systems are stationary and/or restricted to well-prot

APA, Harvard, Vancouver, ISO, and other styles

13

Roy, A. S., S. M. Gibbons, H. Schunck, et al. "Ocean acidification shows negligible impacts on high-latitude bacterial community structure in coastal pelagic mesocosms." Biogeosciences 10, no. 1 (2013): 555–66. http://dx.doi.org/10.5194/bg-10-555-2013.

Full text

Abstract:

Abstract. The impact of ocean acidification and carbonation on microbial community structure was assessed during a large-scale in situ costal pelagic mesocosm study, included as part of the EPOCA 2010 Arctic campaign. The mesocosm experiment included ambient conditions (fjord) and nine mesocosms with pCO2 levels ranging from ~145 to ~1420 μatm. Samples for the present study were collected at ten time points (t–1, t1, t5, t7, t12, t14, t18, t22, t26 to t28) in seven treatments (ambient fjord (~145), 2 × ~185, ~270, ~685, ~820, ~1050 μatm) and were analysed for "small" and "large" size fraction

APA, Harvard, Vancouver, ISO, and other styles

14

Karayanni, Kormas, Moustaka-Gouni, and Sommer. "Changes in Heterotrophic Picoplankton Community Structure after Induction of a Phytoplankton Bloom under Different Light Regimes." Diversity 11, no. 10 (2019): 195. http://dx.doi.org/10.3390/d11100195.

Full text

Abstract:

Bacterial and archaeal diversity and succession were studied during a mesocosm experiment that investigated whether changing light regimes could affect the onset of phytoplankton blooms. For this, 454-pyrosequencing of the bacterial V1-V3 and archaeal V3-V9 16S rRNA regions was performed in samples collected from four mesocosms receiving different light irradiances at the beginning and the end of the experiment and during phytoplankton growth. In total, 46 bacterial operational taxonomic units (OTUs) with ≥1% relative abundance occurred (22–34 OTUs per mesocosm). OTUs were affiliated mainly wi

APA, Harvard, Vancouver, ISO, and other styles

15

Bach, Lennart Thomas, Allanah Joy Paul, Tim Boxhammer, et al. "Factors controlling plankton community production, export flux, and particulate matter stoichiometry in the coastal upwelling system off Peru." Biogeosciences 17, no. 19 (2020): 4831–52. http://dx.doi.org/10.5194/bg-17-4831-2020.

Full text

Abstract:

Abstract. Eastern boundary upwelling systems (EBUS) are among the most productive marine ecosystems on Earth. The production of organic material is fueled by upwelling of nutrient-rich deep waters and high incident light at the sea surface. However, biotic and abiotic factors can modify surface production and related biogeochemical processes. Determining these factors is important because EBUS are considered hotspots of climate change, and reliable predictions of their future functioning requires understanding of the mechanisms driving the biogeochemical cycles therein. In this field experimen

APA, Harvard, Vancouver, ISO, and other styles

16

Li, Yuanzhi, and Bill Shipley. "Functional niche occupation and species richness in herbaceous plant communities along experimental gradients of stress and disturbance." Annals of Botany 124, no. 5 (2019): 861–67. http://dx.doi.org/10.1093/aob/mcz140.

Full text

Abstract:

Abstract Background and Aims The patterns of niche occupation in functional trait space have been widely studied to understand the processes of community assembly, but are rarely linked to environmental conditions (here, stress and disturbance). In this study, we investigate (1) how the pattern of functional niche occupation, incorporating intraspecific trait variation and covariation, varies along experimental gradients of stress and disturbance, (2) whether habitat filtering and/or limiting similarity modify the pattern, and (3) whether their strength varies as a function of species richness

APA, Harvard, Vancouver, ISO, and other styles

17

Engel, A., C. Borchard, J. Piontek, K. G. Schulz, U. Riebesell, and R. Bellerby. "CO<sub>2</sub> increases <sup>14</sup>C primary production in an Arctic plankton community." Biogeosciences 10, no. 3 (2013): 1291–308. http://dx.doi.org/10.5194/bg-10-1291-2013.

Full text

Abstract:

Abstract. Responses to ocean acidification in plankton communities were studied during a CO2-enrichment experiment in the Arctic Ocean, accomplished from June to July 2010 in Kongsfjorden, Svalbard (78°56′ 2′′ N, 11°53′ 6′′ E). Enclosed in 9 mesocosms (volume: 43.9–47.6 m3), plankton was exposed to CO2 concentrations, ranging from glacial to projected mid-next-century levels. Fertilization with inorganic nutrients at day 13 of the experiment supported the accumulation of phytoplankton biomass, as indicated by two periods of high chl a concentration. This study tested for CO2 sensitivities in p

APA, Harvard, Vancouver, ISO, and other styles

18

Mathesius, Sabine, Julia Getzlaff, Heiner Dietze, Andreas Oschlies, and Markus Schartau. "Reanalysis of vertical mixing in mesocosm experiments: PeECE III and KOSMOS 2013." Earth System Science Data 12, no. 3 (2020): 1775–87. http://dx.doi.org/10.5194/essd-12-1775-2020.

Full text

Abstract:

Abstract. Controlled manipulation of environmental conditions within large enclosures in the ocean, so-called pelagic mesocosms, has become a standard method to explore potential responses of marine plankton communities to anthropogenic change. Among the challenges of interpreting mesocosm data is the often uncertain role of vertical mixing, which usually is not observed directly. To account for mixing nonetheless, two pragmatic assumptions are common: either that the water column is homogeneously mixed or that it is divided into two water bodies with a horizontal barrier inhibiting turbulent

APA, Harvard, Vancouver, ISO, and other styles

19

Nausch, M., L. Bach, J. Czerny, et al. "Effects of CO<sub>2</sub> perturbation on phosphorus pool sizes and uptake in a mesocosm experiment during a low productive summer season in the northern Baltic Sea." Biogeosciences Discussions 12, no. 20 (2015): 17543–93. http://dx.doi.org/10.5194/bgd-12-17543-2015.

Full text

Abstract:

Abstract. Studies investigating the effect of increasing CO2 levels on the phosphorus cycle in natural waters are lacking although phosphorus often controls phytoplankton development in aquatic systems. The aim of our study was to analyze effects of elevated CO2 levels on phosphorus pool sizes and uptake. Therefore, we conducted a CO2-manipulation mesocosm experiment in the Storfjärden (western Gulf of Finland, Baltic Sea) in summer 2012. We compared the phosphorus dynamics in different mesocosm treatments but also studied them outside the mesocosms in the surrounding fjord water. In the mesoc

APA, Harvard, Vancouver, ISO, and other styles

20

Turk-Kubo, K. A., I. E. Frank, M. E. Hogan, A. Desnues, S. Bonnet, and J. P. Zehr. "Diazotroph community succession during the VAHINE mesocosm experiment (New Caledonia lagoon)." Biogeosciences 12, no. 24 (2015): 7435–52. http://dx.doi.org/10.5194/bg-12-7435-2015.

Full text

Abstract:

Abstract. The VAHINE mesocosm experiment, conducted in the low-nutrient low-chlorophyll waters of the Noumea lagoon (coastal New Caledonia) was designed to trace the incorporation of nitrogen (N) fixed by diazotrophs into the food web, using large volume (50 m3) mesocosms. This experiment provided a unique opportunity to study the succession of different N2-fixing microorganisms (diazotrophs) and calculate in situ net growth and mortality rates in response to fertilization with dissolved inorganic phosphate (DIP) over a 23-day period, using quantitative polymerase chain reaction (qPCR) assays

APA, Harvard, Vancouver, ISO, and other styles

21

Walford, Susanne E., Peter F. Lee, and Robert W. Mackereth. "Treatment of wet peat mining process water with acrotelm peat." Water Quality Research Journal 47, no. 2 (2012): 117–30. http://dx.doi.org/10.2166/wqrjc.2012.029.

Full text

Abstract:

Mechanical dewatering of wet mined peat produced peat mining process water (PMPW) with low pH (5.49) and high total suspended solids (TSS 432 mg L−1), Al (1.39 mg L−1), Fe (4.36 mg L−1), Hg (37.1 ng L−1), MeHg (0.485 ng L−1), Zn (55 μg L−1), total nitrogen (TN 7.92 mg L−1), total phosphorus (TP 303 μg L−1) and true colour (532 TCU). High removal efficiencies were calculated for acrotelm peat filters (mesocosms) used to treat PMPW (TSS 45–83%; particulate organic carbon (POC) 47–89%; metals 53–100%; TN 85%; TP 81%), though final mesocosm leachate concentrations did not all achieve Canadian Wate

APA, Harvard, Vancouver, ISO, and other styles

22

Czerny, J., K. G. Schulz, S. A. Krug, A. Ludwig, and U. Riebesell. "Technical Note: The determination of enclosed water volume in large flexible-wall mesocosms "KOSMOS"." Biogeosciences 10, no. 3 (2013): 1937–41. http://dx.doi.org/10.5194/bg-10-1937-2013.

Full text

Abstract:

Abstract. The volume of water enclosed inside flexible-wall mesocosm bags is hard to estimate using geometrical calculations and can be strongly variable among bags of the same dimensions. Here we present a method for precise water volume determination in mesocosms using salinity as a tracer. Knowledge of the precise volume of water enclosed allows establishment of exactly planned treatment concentrations and calculation of elemental budgets.

APA, Harvard, Vancouver, ISO, and other styles

23

Czerny, J., K. G. Schulz, S. A. Krug, A. Ludwig, and U. Riebesell. "Technical Note: On the determination of enclosed water volume in large flexible-wall mesocosms." Biogeosciences Discussions 9, no. 9 (2012): 13019–30. http://dx.doi.org/10.5194/bgd-9-13019-2012.

Full text

Abstract:

Abstract. The volume of water enclosed inside flexible-wall mesocosm bags is hard to estimate using geometrical calculations and can be strongly variable among bags of the same dimensions. Here we present a method for precise water volume determination in mesocosms using salinity as a tracer. Knowledge of the precise volume of water enclosed allows establishment of exactly planed treatment concentrations and calculation of elemental budgets.

APA, Harvard, Vancouver, ISO, and other styles

24

Foekema, E. M., N. H. B. M. Kaag, D. M. van Hussel, R. G. Jak, M. C. Th Scholten, and C. v.d. Guchte. "Mesocosm observations on the ecological response of an aquatic community to sediment contamination." Water Science and Technology 37, no. 6-7 (1998): 249–56. http://dx.doi.org/10.2166/wst.1998.0759.

Full text

Abstract:

Between 1992 and 1997 the effects of contaminated sediment on an aquatic community were studied in outdoor mesocosms (2m3), one filled with ‘naturally’ polluted sediment from the sedimentation area ‘Ketelmeer’, the other with relatively clean sediment from the shallow lake ‘Oostvaardersplassen’. Negative effects of the contaminated sediment were observed on the population development of the amoeba species Arcella megastoma and Difflugia accuminata, the mysid shrimp Neomysis integer, the microlepidopteran Cataclysta lemnata and the cladoceran community, whereas the biting midge Culex sp. showed

APA, Harvard, Vancouver, ISO, and other styles

25

Motegi, C., T. Tanaka, J. Piontek, C. P. D. Brussaard, J. P. Gattuso, and M. G. Weinbauer. "Effect of CO<sub>2</sub> enrichment on bacterial production and respiration and on bacterial carbon metabolism in Arctic waters." Biogeosciences Discussions 9, no. 10 (2012): 15213–35. http://dx.doi.org/10.5194/bgd-9-15213-2012.

Full text

Abstract:

Abstract. The impact of rising carbon dioxide (pCO2) on bacterial production (BP), bacterial respiration (BR) and bacterial carbon metabolism was investigated during the mesocosm experiment in Kongsfjord (Svalbard) in 2010. The mesocosm experiment lasted 30 days and nine mesocosms with pCO2 levels ranging from ca. 180 to 1400 μatm were used. Generally, BP gradually decreased in all mesocosms in an initial phase, showed a large (3.6-fold in average) but temporary increase on day 10, and increased slightly afterwards. BP increased with increasing pCO2 at the beginning of the experiment (day 5).

APA, Harvard, Vancouver, ISO, and other styles

26

Krishna, Shubham, and Markus Schartau. "A data–model synthesis to explain variability in calcification observed during a CO<sub>2</sub> perturbation mesocosm experiment." Biogeosciences 14, no. 7 (2017): 1857–82. http://dx.doi.org/10.5194/bg-14-1857-2017.

Full text

Abstract:

Abstract. The effect of ocean acidification on growth and calcification of the marine algae Emiliania huxleyi was investigated in a series of mesocosm experiments where enclosed water volumes that comprised a natural plankton community were exposed to different carbon dioxide (CO2) concentrations. Calcification rates observed during those experiments were found to be highly variable, even among replicate mesocosms that were subject to similar CO2 perturbations. Here, data from an ocean acidification mesocosm experiment are reanalysed with an optimality-based dynamical plankton model. According

APA, Harvard, Vancouver, ISO, and other styles

27

Reilly, Timothy J. "The Use of Mesocosms in Marine Oil Spill Ecological Research and Development." Pure and Applied Chemistry 71, no. 1 (1999): 153–60. http://dx.doi.org/10.1351/pac199971010153.

Full text

Abstract:

Introduction: The use of chemical and biological agents (e.g. dispersants and bioremediation agents, respectively), as well as certain physical oil removal techniques (e.g. high-pressure, hot-water applications to oiled shorelines) during oil spill response operations requires consideration both of the gross effectiveness of such oil removal/displacement techniques and of the ecological impact of the response technique. Accordingly, the intent of response technology optimization requires the identification of suitable response agents, their application strategies, determination of mass oil rem

APA, Harvard, Vancouver, ISO, and other styles

28

Schulz, K. G., U. Riebesell, R. G. J. Bellerby, et al. "Build-up and decline of organic matter during PeECE III." Biogeosciences 5, no. 3 (2008): 707–18. http://dx.doi.org/10.5194/bg-5-707-2008.

Full text

Abstract:

Abstract. Increasing atmospheric carbon dioxide (CO2) concentrations due to anthropogenic fossil fuel combustion are currently changing the ocean's chemistry. Increasing oceanic [CO2] and consequently decreasing seawater pH have the potential to significantly impact marine life. Here we describe and analyze the build-up and decline of a natural phytoplankton bloom initiated during the 2005 mesocosm Pelagic Ecosystem CO2 Enrichment study (PeECE III). The draw-down of inorganic nutrients in the upper surface layer of the mesocosms was reflected by a concomitant increase of organic matter until d

APA, Harvard, Vancouver, ISO, and other styles

29

Czerny, J., K. G. Schulz, A. Ludwig, and U. Riebesell. "A simple method for air/sea gas exchange measurement in mesocosms and its application in carbon budgeting." Biogeosciences Discussions 9, no. 9 (2012): 11989–2017. http://dx.doi.org/10.5194/bgd-9-11989-2012.

Full text

Abstract:

Abstract. Mesocosms as large experimental vessels principally provide the opportunity of performing elemental budget calculations e.g. to derive net biological turnover rates. However, the system is in most cases not closed at the water surface and gases can exchange with the atmosphere. Previous attempts to budget carbon pools in mesocosms relied on educated guesses concerning the exchange of CO2 with the atmosphere. Nevertheless, net primary production rates derived from these budget calculations were, despite large uncertainties in air/sea gas exchange, often more reasonable than cumulative

APA, Harvard, Vancouver, ISO, and other styles

30

Thaysen, E. M., S. Jessen, P. Ambus, C. Beier, D. Postma, and I. Jakobsen. "Technical Note: Mesocosm approach to quantify dissolved inorganic carbon percolation fluxes." Biogeosciences 11, no. 4 (2014): 1077–84. http://dx.doi.org/10.5194/bg-11-1077-2014.

Full text

Abstract:

Abstract. Dissolved inorganic carbon (DIC) fluxes across the vadose zone are influenced by a complex interplay of biological, chemical and physical factors. A novel soil mesocosm system was evaluated as a tool for providing information on the mechanisms behind DIC percolation to the groundwater from unplanted soil. Carbon dioxide partial pressure (pCO2), alkalinity, soil moisture and temperature were measured with depth and time, and DIC in the percolate was quantified using a sodium hydroxide trap. Results showed good reproducibility between two replicate mesocosms. The pCO2 varied between 0.

APA, Harvard, Vancouver, ISO, and other styles

31

Julian, Michele E., Cari-Ann M. Hickerson, and Carl D. Anthony. "Competition and Intraguild Predation Between Beetles, Pterostichus stygicus (Coleoptera: Carabidae) and Centipedes, Scolopocryptops sexspinosus (Scolopemdromorpha: Scolopocryptopidae)." Annals of the Entomological Society of America 112, no. 5 (2019): 473–81. http://dx.doi.org/10.1093/aesa/saz034.

Full text

Abstract:

Abstract Studying interactions between distantly related species is necessary to understand the complexity of food webs. Generalist predator interactions, such as intraguild predation (IGP) and competition, can alleviate predation pressure and weaken top–down control that predators have on lower trophic levels. Centipedes (Chilopoda) and carabid beetles (Coleoptera) are common deciduous forest floor generalist predators that may interact by competing for resources beneath rocks and logs on the forest floor, especially during dry periods when prey become confined to such microhabitats. We used

APA, Harvard, Vancouver, ISO, and other styles

32

Becker, Petra M., Helmut Wand, Günter GS Martius, Erika Weißrodt, and Ulrich Stottmeister. "Functional and structural successions in arbitrary samples of heterotrophic bacteria during aerobic treatments of lignite-carbonization wastewater inin situenclosures." Canadian Journal of Microbiology 44, no. 3 (1998): 211–20. http://dx.doi.org/10.1139/w97-151.

Full text

Abstract:

In situ mesocosm experiments were performed in Lake Schwelvollert (located in the district of Weißenfels, Saxony-Anhalt, Germany), an anaerobic lignite-carbonization effluent lake containing phenolic compounds and their autoxidation products (anthropogenic humic matter). In the aeration enclosure, the anaerobic Schwelvollert wastewater was aerated and in the flocculation enclosure, it was flocculated to precipitate the oxygen-trapping anthropogenic humic matter to enhance the input of oxygen by diffusion. To gain an insight into the metabolic state of the aerobic heterotrophic microbiota durin

APA, Harvard, Vancouver, ISO, and other styles

33

Meyer, J., C. R. Löscher, S. C. Neulinger, et al. "Changing nutrient stoichiometry affects phytoplankton production, DOP accumulation and dinitrogen fixation – a mesocosm experiment in the eastern tropical North Atlantic." Biogeosciences 13, no. 3 (2016): 781–94. http://dx.doi.org/10.5194/bg-13-781-2016.

Full text

Abstract:

Abstract. Ocean deoxygenation due to climate change may alter redox-sensitive nutrient cycles in the marine environment. The productive eastern tropical North Atlantic (ETNA) upwelling region may be particularly affected when the relatively moderate oxygen minimum zone (OMZ) deoxygenates further and microbially driven nitrogen (N) loss processes are promoted. Consequently, water masses with a low nitrogen to phosphorus (N : P) ratio could reach the euphotic layer, possibly influencing primary production in those waters. Previous mesocosm studies in the oligotrophic Atlantic Ocean identified ni

APA, Harvard, Vancouver, ISO, and other styles

34

Meyer, J., C. R. Löscher, S. C. Neulinger, et al. "Changing nutrient stoichiometry affects phytoplankton production, DOP build up and dinitrogen fixation – a mesocosm experiment in the eastern tropical North Atlantic." Biogeosciences Discussions 12, no. 13 (2015): 9991–10029. http://dx.doi.org/10.5194/bgd-12-9991-2015.

Full text

Abstract:

Abstract. Ocean deoxygenation due to climate change may alter redox-sensitive nutrient cycles in the marine environment. The productive eastern tropical North Atlantic (ETNA) upwelling region may be particularly affected when the relatively moderate oxygen minimum zone (OMZ) deoxygenates further and microbially-driven nitrogen (N) loss processes are promoted. Consequently, water masses with a low N : P ratio could reach the euphotic layer, possibly influencing primary production in those waters. Previous mesocosm studies in the oligotrophic Atlantic Ocean identified N availability as controlli

APA, Harvard, Vancouver, ISO, and other styles

35

Czerny, J., K. G. Schulz, T. Boxhammer, et al. "Element budgets in an Arctic mesocosm CO<sub>2</sub> perturbation study." Biogeosciences Discussions 9, no. 8 (2012): 11885–924. http://dx.doi.org/10.5194/bgd-9-11885-2012.

Full text

Abstract:

Abstract. Recent studies on the impacts of ocean acidification on pelagic communities have identified changes in carbon to nutrient dynamics with related shifts in elemental stoichiometry. In principle, mesocosm experiments provide the opportunity of determining the temporal dynamics of all relevant carbon and nutrient pools and, thus, calculating elemental budgets. In practice, attempts to budget mesocosm enclosures are often hampered by uncertainties in some of the measured pools and fluxes, in particular due to uncertainties in constraining air/sea gas exchange, particle sinking, and wall g

APA, Harvard, Vancouver, ISO, and other styles

36

Thaysen, E. M., S. Jessen, P. Ambus, C. Beier, D. Postma, and I. Jakobsen. "Technical note: mesocosm approach to quantification of carbon dioxide fluxes across the vadose zone." Biogeosciences Discussions 10, no. 6 (2013): 9947–67. http://dx.doi.org/10.5194/bgd-10-9947-2013.

Full text

Abstract:

Abstract. Carbon dioxide (CO2) fluxes in the vadose zone are influenced by a complex interplay of biological, chemical and physical factors. A soil mesocosm system was designed to assess the effect of agricultural practices on carbon fluxes within and out of the vadose zone at controlled environmental conditions. Carbon dioxide partial pressure (pCO2), alkalinity, soil moisture and temperature were measured with depth and time, and DIC in the percolate was quantified using a sodium hydroxide trap. Results showed good reproducibility between two replicate mesocosms. The pCO2 varied between 0.2–

APA, Harvard, Vancouver, ISO, and other styles

37

Niehoff, B., T. Schmithüsen, N. Knüppel, M. Daase, J. Czerny, and T. Boxhammer. "Mesozooplankton community development at elevated CO<sub>2</sub> concentrations: results from a mesocosm experiment in an Arctic fjord." Biogeosciences 10, no. 3 (2013): 1391–406. http://dx.doi.org/10.5194/bg-10-1391-2013.

Full text

Abstract:

Abstract. The increasing CO2 concentration in the atmosphere caused by burning fossil fuels leads to increasing pCO2 and decreasing pH in the world ocean. These changes may have severe consequences for marine biota, especially in cold-water ecosystems due to higher solubility of CO2. However, studies on the response of mesozooplankton communities to elevated CO2 are still lacking. In order to test whether abundance and taxonomic composition change with pCO2, we have sampled nine mesocosms, which were deployed in Kongsfjorden, an Arctic fjord at Svalbard, and were adjusted to eight CO2 concentr

APA, Harvard, Vancouver, ISO, and other styles

38

Berthold, Maximilian, and Martin Paar. "Dynamics of primary productivity in relation to submerged vegetation of a shallow, eutrophic lagoon: A field and mesocosm study." PLOS ONE 16, no. 5 (2021): e0247696. http://dx.doi.org/10.1371/journal.pone.0247696.

Full text

Abstract:

Aquatic ecosystems nowadays are under constant pressure, either from recent or historical events. In most systems with increased nutrient supply, submerged macrophytes got replaced by another stable state, dominated by phytoplankton as main primary producer. Yet, reducing the nutrient supply did not yield the aimed goal of restored habitats for submerged macrophytes in systems worldwide. The question arises, why submerged macrophytes do not re-colonize, and if they are actually competitive. Therefore, primary production assays were conducted in ex-situ bentho-pelagic mesocosms and compared to

APA, Harvard, Vancouver, ISO, and other styles

39

Zhang, Sheng-Hui, Juan Yu, Qiong-Yao Ding, et al. "Effect of elevated <i>p</i>CO<sub>2</sub> on trace gas production during an ocean acidification mesocosm experiment." Biogeosciences 15, no. 21 (2018): 6649–58. http://dx.doi.org/10.5194/bg-15-6649-2018.

Full text

Abstract:

Abstract. A mesocosm experiment was conducted in Wuyuan Bay (Xiamen), China, to investigate the effects of elevated pCO2 on the phytoplankton species Phaeodactylum tricornutum (P. tricornutum), Thalassiosira weissflogii (T. weissflogii) and Emiliania huxleyi (E. huxleyi) and their production ability of dimethylsulfide (DMS), dimethylsulfoniopropionate (DMSP), as well as four halocarbon compounds, bromodichloromethane (CHBrCl2), methyl bromide (CH3Br), dibromomethane (CH2Br2) and iodomethane (CH3I). Over a period of 5 weeks, P. tricornuntum outcompeted T. weissflogii and E. huxleyi, comprising

APA, Harvard, Vancouver, ISO, and other styles

40

Ejsmont-Karabin, Jolanta, Irina Feniova, Iwona Kostrzewska-Szlakowska, Marek Rzepecki, Varos G. Petrosyan, and Andrew R. Dzialowski. "Use of rotifer trophic state indices to show the effect of hydrobionts and nutrients on water trophic status in mesocosms." Oceanological and Hydrobiological Studies 49, no. 2 (2020): 123–31. http://dx.doi.org/10.1515/ohs-2020-0011.

Full text

Abstract:

AbstractWe have determined how Crustacea, zebra mussels (Dreissena polymorpha), fish and nutrients affect the trophic state in mesocosms filled with water collected from the pelagic zone of a eutrophic lake. We hypothesized that the pool of nutrients would increase both directly due to the input of phosphorus and nitrogen and/or indirectly due to the introduction of animal biomass. We used trophic state indices based on the abundance and species structure of rotifers to assess changes in the trophic state in mesocosms. The role of small detritophages in rotifer communities increased as a resul

APA, Harvard, Vancouver, ISO, and other styles

41

Miller, Luke P., and Jeremy D. Long. "A tide prediction and tide height control system for laboratory mesocosms." PeerJ 3 (November 24, 2015): e1442. http://dx.doi.org/10.7717/peerj.1442.

Full text

Abstract:

Experimental mesocosm studies of rocky shore and estuarine intertidal systems may benefit from the application of natural tide cycles to better replicate variation in immersion time, water depth, and attendant fluctuations in abiotic and edaphic conditions. Here we describe a stand-alone microcontroller tide prediction open-source software program, coupled with a mechanical tidal elevation control system, which allows continuous adjustment of aquarium water depths in synchrony with local tide cycles. We used this system to monitor the growth ofSpartina foliosamarsh cordgrass and scale insect h

APA, Harvard, Vancouver, ISO, and other styles

42

Weber, Kela P., and Raymond L. Legge. "Comparison of the catabolic activity and catabolic profiles of rhizospheric, gravel-associated and interstitial microbial communities in treatment wetlands." Water Science and Technology 67, no. 4 (2013): 886–93. http://dx.doi.org/10.2166/wst.2012.637.

Full text

Abstract:

Microbial communities play a critical role in degrading organic contaminants in treatment wetlands; however, an understanding of the different roles played by rhizospheric, gravel-associated and interstitial microbial communities is deficient due to a lack of data directly comparing these microbial communities. Community level physiological profiling (CLPP) was used to compare the catabolic capabilities of rhizospheric, gravel-associated and interstitial microbial communities in vertical-flow planted and unplanted wetland mesocosms. Wetland mesocosms were decommissioned to gather microbial com

APA, Harvard, Vancouver, ISO, and other styles

43

Park, J. B. K., and R. J. Craggs. "Effect of algal recycling rate on the performance of Pediastrum boryanum dominated wastewater treatment high rate algal pond." Water Science and Technology 70, no. 8 (2014): 1299–306. http://dx.doi.org/10.2166/wst.2014.369.

Full text

Abstract:

Recycling a portion of gravity harvested algae promoted the dominance of a rapidly settling colonial alga, Pediastrum boryanum (P. boryanum) and improved both biomass productivity and settleability in High Rate Algal Pond (HRAP) treating domestic wastewater. The effect of algal recycling rate on HRAP performance was investigated using 12 replicate mesocosms (18 L) that were operated semi-continuously under ambient conditions. Three experiments were conducted during different seasons with each experiment lasting up to 36 days. Recycling 10%, 25%, and 50% of the ‘mass’ of daily algal production

APA, Harvard, Vancouver, ISO, and other styles

44

Anderson, Kimberly L., John E. Whitlock, and Valerie J. Harwood. "Persistence and Differential Survival of Fecal Indicator Bacteria in Subtropical Waters and Sediments." Applied and Environmental Microbiology 71, no. 6 (2005): 3041–48. http://dx.doi.org/10.1128/aem.71.6.3041-3048.2005.

Full text

Abstract:

ABSTRACT Fecal coliforms and enterococci are indicator organisms used worldwide to monitor water quality. These bacteria are used in microbial source tracking (MST) studies, which attempt to assess the contribution of various host species to fecal pollution in water. Ideally, all strains of a given indicator organism (IO) would experience equal persistence (maintenance of culturable populations) in water; however, some strains may have comparatively extended persistence outside the host, while others may persist very poorly in environmental waters. Assessment of the relative contribution of ho

APA, Harvard, Vancouver, ISO, and other styles

45

Hendrickx, Barbara, Winnie Dejonghe, Wesley Boënne, et al. "Dynamics of an Oligotrophic Bacterial Aquifer Community during Contact with a Groundwater Plume Contaminated with Benzene, Toluene, Ethylbenzene, and Xylenes: an In Situ Mesocosm Study†." Applied and Environmental Microbiology 71, no. 7 (2005): 3815–25. http://dx.doi.org/10.1128/aem.71.7.3815-3825.2005.

Full text

Abstract:

ABSTRACT An in situ mesocosm system was designed to monitor the in situ dynamics of the microbial community in polluted aquifers. The mesocosm system consists of a permeable membrane pocket filled with aquifer material and placed within a polypropylene holder, which is inserted below groundwater level in a monitoring well. After a specific time period, the microcosm is recovered from the well and its bacterial community is analyzed. Using this system, we examined the effect of benzene, toluene, ethylbenzene, and xylene (BTEX) contamination on the response of an aquifer bacterial community by d

APA, Harvard, Vancouver, ISO, and other styles

46

Engel, A., C. Borchard, J. Piontek, K. Schulz, U. Riebesell, and R. Bellerby. "CO<sub>2</sub> increases <sup>14</sup>C-primary production in an Arctic plankton community." Biogeosciences Discussions 9, no. 8 (2012): 10285–330. http://dx.doi.org/10.5194/bgd-9-10285-2012.

Full text

Abstract:

Abstract. Responses to ocean acidification in plankton communities were studied during a CO2-enrichment experiment in the Arctic Ocean, accomplished from June to July 2010 in Kongsfjorden, Svalbard (78°56, 2' N, 11°53, 6' E). Enclosed in 9 mesocosms (volume: 43.9–47.6 m3), plankton was exposed to CO2 concentrations, ranging from glacial to projected mid-next-century levels. Fertilization with inorganic nutrients at day 13 of the experiment supported the accumulation of phytoplankton biomass, as indicated by two periods of high Chl a concentration. This study tested for CO2 sensitivities in pri

APA, Harvard, Vancouver, ISO, and other styles

47

Dunn, Ryan J. K., David T. Welsh, Peter R. Teasdale, Franck Gilbert, Jean-Christophe Poggiale, and Nathan J. Waltham. "Effects of the Bioturbating Marine Yabby Trypaea australiensis on Sediment Properties in Sandy Sediments Receiving Mangrove Leaf Litter." Journal of Marine Science and Engineering 7, no. 12 (2019): 426. http://dx.doi.org/10.3390/jmse7120426.

Full text

Abstract:

Laboratory mesocosm incubations were undertaken to investigate the influence of burrowing shrimp Trypaea australiensis (marine yabby) on sediment reworking, physical and chemical sediment characteristics and nutrients in sandy sediments receiving mangrove (Avicennia marina) leaf litter. Mesocosms of sieved, natural T. australiensis inhabited sands, were continually flushed with fresh seawater and pre-incubated for 17 days prior to triplicates being assigned to one of four treatments; sandy sediment (S), sediment + yabbies (S+Y), sediment + leaf litter (organic matter; S+OM) and sediment + yabb

APA, Harvard, Vancouver, ISO, and other styles

48

McGlynn, Terrence P., and Evan K. Poirson. "Ants accelerate litter decomposition in a Costa Rican lowland tropical rain forest." Journal of Tropical Ecology 28, no. 5 (2012): 437–43. http://dx.doi.org/10.1017/s0266467412000375.

Full text

Abstract:

Abstract:The decomposition of leaf litter is governed, in part, by litter invertebrates. In tropical rain forests, ants are dominant predators in the leaf litter and may alter litter decomposition through the action of a top-down control of food web structure. The role of ants in litter decomposition was investigated in a Costa Rican lowland rain forest with two experiments. In a mesocosm experiment, we manipulated ant presence in 50 ambient leaf-litter mesocosms. In a litterbag gradient experiment, Cecropia obtusifolia litter was used to measure decomposition rate constants across gradients i

APA, Harvard, Vancouver, ISO, and other styles

49

Fuxjäger, Lukas, Sylvia Wanzenböck, Eva Ringler, K. Mathias Wegner, Harald Ahnelt, and Lisa N. S. Shama. "Within-generation and transgenerational plasticity of mate choice in oceanic stickleback under climate change." Philosophical Transactions of the Royal Society B: Biological Sciences 374, no. 1768 (2019): 20180183. http://dx.doi.org/10.1098/rstb.2018.0183.

Full text

Abstract:

Plasticity, both within and across generations, can shape sexual traits involved in mate choice and reproductive success, and thus direct measures of fitness. Especially, transgenerational plasticity (TGP), where parental environment influences offspring plasticity in future environments, could compensate for otherwise negative effects of environmental change on offspring sexual traits. We conducted a mate choice experiment using stickleback ( Gasterosteus aculeatus ) with different thermal histories (ambient 17°C or elevated 21°C) within and across generations under simulated ocean warming us

APA, Harvard, Vancouver, ISO, and other styles

50

Wagener, T., C. Guieu, and N. Leblond. "Effects of dust deposition on iron cycle in the surface Mediterranean Sea: results from a mesocosm seeding experiment." Biogeosciences 7, no. 11 (2010): 3769–81. http://dx.doi.org/10.5194/bg-7-3769-2010.

Full text

Abstract:

Abstract. Soil dust deposition is recognized as a major source of iron to the open ocean at global and regional scales. However, the processes that control the speciation and cycle of iron in the surface ocean after dust deposition are poorly documented mainly due to the logistical difficulties to investigate in-situ, natural dust events. The development of clean mesocosms in the frame of the DUNE project (a DUst experiment in a low Nutrient low chlorophyll Ecosystem) was a unique opportunity to investigate these processes at the unexplored scale of one dust deposition event. During the DUNE-1

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!