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Journal articles on the topic 'Biotic refuge'

Author: Grafiati

Published: 4 June 2021

Last updated: 5 February 2022

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1

Murphy, Karen A., Joel H. Reynolds, and John M. Koltun. "Evaluating the ability of the differenced Normalized Burn Ratio (dNBR) to predict ecologically significant burn severity in Alaskan boreal forests." International Journal of Wildland Fire 17, no. 4 (2008): 490. http://dx.doi.org/10.1071/wf08050.

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During the 2004 fire season ~6.6 million acres (~2.7 million ha) burned across Alaska. Nearly 2 million of these were on National Wildlife Refuge System lands inaccessible from the state’s limited road system. Many fires burned through September, driven by unusually warm and dry temperatures throughout the summer. Using several fires from this season, we assessed the national burn severity methodology’s performance on refuge lands. Six fires, spanning 814 489 acres (329 613 ha), were sampled on five boreal forest refuges. In total, 347 sites were sampled for vegetation composition and ground-b

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McDonald, Peter J., Alistair Stewart, Melissa A. Jensen, and Hugh W. McGregor. "Topographic complexity potentially mediates cat predation risk for a critically endangered rodent." Wildlife Research 47, no. 8 (2020): 643. http://dx.doi.org/10.1071/wr19172.

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ContextThe niche reduction hypothesis (NRH) predicts that the realised niche of declining species is reduced by threats that are mediated by environmental, biotic and evolutionary processes, explaining why species decline in some locations but not others. The critically endangered central rock-rat (CRR) survives only in rugged mountain range habitat in central Australia and is highly vulnerable to cat predation. We predicted that cat density and ranging behaviour, and, hence, predation risk, is mediated by habitat complexity, thus explaining the mechanism maintaining the CRR refuge. AimsWe sou

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Tallowin, Oliver J. S., Shai Meiri, Stephen C. Donnellan, Stephen J. Richards, Christopher C. Austin, and Paul M. Oliver. "The other side of the Sahulian coin: biogeography and evolution of Melanesian forest dragons (Agamidae)." Biological Journal of the Linnean Society 129, no. 1 (November 12, 2019): 99–113. http://dx.doi.org/10.1093/biolinnean/blz125.

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Abstract New Guinea has been considered both as a refuge for mesic rainforest-associated lineages that contracted in response to the late Cenozoic aridification of Australia and as a centre of biotic diversification and radiation since the mid-Miocene or earlier. Here, we estimate the diversity and a phylogeny for the Australo-Papuan forest dragons (Sauria: Agamidae; ~20 species) in order to examine the following: (1) whether New Guinea and/or proto-Papuan Islands may have been a biogeographical refuge or a source for diversity in Australia; (2) whether mesic rainforest environments are ancest

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Booth, John D. "Habitat preferences and behaviour of newly settled Jasus edwardsii (Palinuridae)." Marine and Freshwater Research 52, no. 8 (2001): 1055. http://dx.doi.org/10.1071/mf01089.

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Any attempt to enhance production of rock lobsters by increasing survival at and soon after settlement, or by catching pueruli for on-growing or out-planting, requires knowledge of settlement behaviour and the habitat of settlers and young juveniles. I investigated biotic and physical factors important in habitat use by recently settled Jasus edwardsii in laboratory tank experiments. Both pueruli and first-instar juveniles sought shelter over and above conspecifics or any of the other marine life tested. They preferred conditioned refuges over those unconditioned, horizontal apertures over upw

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Noisette, Fanny, and Catriona Hurd. "Abiotic and biotic interactions in the diffusive boundary layer of kelp blades create a potential refuge from ocean acidification." Functional Ecology 32, no. 5 (March 20, 2018): 1329–42. http://dx.doi.org/10.1111/1365-2435.13067.

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Boiteau, G., A. Alyokhin, and D. N. Ferro. "The Colorado potato beetle in movement." Canadian Entomologist 135, no. 1 (February 2003): 1–22. http://dx.doi.org/10.4039/n02-008.

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AbstractThe recent introduction of the concept of refuge areas for the management of the Colorado potato beetle, Leptinotarsa decemlineata (Say) (Coleoptera : Chrysomelidae), on resistant potato highlighted the existence of important gaps in our knowledge and understanding of this pest's movement within and between habitats. The objective of this review is to synthesize the information available for the benefit of crop managers and to identify subject areas in need of additional research. A traditional, somewhat encyclopedic, review of the old and recent literature on research methods, basics

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Tangen, Brian A., Raymond G. Finocchiaro, Wesley E. Newton, and Charles F. Dahl. "Aquatic Vegetation and Invertebrate Communities of Big Stone National Wildlife Refuge." Journal of Fish and Wildlife Management 10, no. 1 (March 1, 2019): 277–94. http://dx.doi.org/10.3996/082018-jfwm-066.

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Abstract Observed degradation of aquatic systems at Big Stone National Wildlife Refuge, located in west-central Minnesota, have been associated with sediment-laden inflows from riverine systems. To support management, a study was conducted during 2013–2014 with overall goals of characterizing the aquatic invertebrate and vegetation communities of the Big Stone National Wildlife Refuge and exploring relations between these communities and various water-quality parameters. Sample sites were located along an observed vegetation gradient and assigned to three predetermined habitat zones for compar

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Taira, D., EC Heery, LHL Loke, A. Teo, AG Bauman, and PA Todd. "Ecological engineering across organismal scales: trophic-mediated positive effects of microhabitat enhancement on fishes." Marine Ecology Progress Series 656 (December 10, 2020): 181–92. http://dx.doi.org/10.3354/meps13462.

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Retrofitting microhabitat features is a common ecological engineering technique for enhancing biodiversity and abundance of small, epilithic organisms on artificial shorelines by providing refuge spaces and/or ameliorating abiotic conditions. These features are typically too small to be utilised as refugia by larger, highly motile consumers such as fish, but they may affect these organisms through other mechanisms. This study sought to determine whether microhabitat enhancement units alter the fish abundance, richness and assemblage composition on tropical seawalls and explores possible underl

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Bodharamik, Thavin, Waraporn Juntarajumnong, Chamnarn Apiwathnasorn, Sungsit Sungvornyothin, and Uraiwan Arunyawat. "Diversity Of Mosquito Species Ovipositing In Different Zones of Light Intensity Within Limestone Caves In Thailand." Journal of the American Mosquito Control Association 34, no. 3 (September 1, 2018): 182–89. http://dx.doi.org/10.2987/18-6742.1.

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ABSTRACT Climate change and human activity affect the geographical and annual distribution and population abundance of mosquitoes. As natural habitats are reduced, it is hypothesized that mosquitoes may seek refuge in more stable environments such as cave habitats. Therefore, we explored the species diversity of mosquitoes exploiting cave habitats in Thailand. Ten species belonging to 4 genera were collected, of which none were considered to be true cave-dwelling species (Troglobiont). The known cavernicolous species, Aedes cavaticus, was observed to oviposit outside of the cave and therefore

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Caillaux, Luis M., and Wolfgang B. Stotz. "Distribution and abundance of Rhynchocinetes typus (Crustacea: Decapoda), in different benthic community structures in northern Chile." Journal of the Marine Biological Association of the United Kingdom 83, no. 1 (January 10, 2003): 143–50. http://dx.doi.org/10.1017/s0025315403006908h.

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An evaluation was carried out on the distribution and abundance of the rock shrimp Rhynchocinetes typus in the inshore subtidal zone on the north-central coast of Chile. A number of different benthic community types occur in the region which have different degrees of spatial complexity provided by the primary substratum and by the biotic communities colonizing the substratum. Shrimp abundance was estimated in five different community types including shallow and deep ‘barren grounds’, low encrusting communities, erect suspension feeding associations, and kelp beds of Lessonia trabeculata. The a

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Holienková, Barbora, and Zuzana Krumpálová. "EFFECTS OF URBANISM ON MALACOFAUNA (NITRA)." CBU International Conference Proceedings 4 (September 21, 2016): 257–61. http://dx.doi.org/10.12955/cbup.v4.766.

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Recently, the number of alien landscape species has dramatically increased, and this could be a serious threat, not only for native species but also in cases of outbreaks for farmers. Our objective was to examine the impact of the urban environment (positive or negative) on the diversity of native species; forecast biotic homogenization or diversification of urban fauna; and determine the extent to which each of the zones are affected by invasive species. To examine the effect of urbanization, we selected 16 areas (across three urban zones and one zone in the protected area for comparison) for

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Tronstad, Lusha M., J. Joseph Giersch, Scott Hotaling, Debra S. Finn, Lydia Zeglin, Oliver J. Wilmot, and Rebecca J. Bixby. "A unique “icy seep” aquatic habitat in the high Teton Range: Potential refuge for biological assemblages imperiled by climate change." UW National Parks Service Research Station Annual Reports 39 (December 15, 2016): 64–72. http://dx.doi.org/10.13001/uwnpsrc.2016.5289.

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Alpine streams are threatened as meltwater sources diminish. We established baseline monitoring efforts of alpine streams in the Teton Range during 2015 by describing biotic and abiotic conditions of surface glacier and snowmelt streams. Our results indicated a third alpine stream type, icy seeps. Icy seeps are fed by subterranean ice melt, extremely cold but stable water temperature (summer mean <2°C), moderately high streambed stability (Pfankuch Index ~18-25), and relatively high specific conductivity (>50 μS cm-1). In 2016, we documented several icy seeps in the Teton massif, and our

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Delucchi, Carla M. "Comparison of community structure among streams with different temporal flow regimes." Canadian Journal of Zoology 66, no. 3 (March 1, 1988): 579–86. http://dx.doi.org/10.1139/z88-085.

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A study was conducted in four streams in the same watershed in New York to determine whether the benthic invertebrate community structure varied among streams with different temporal flow regimes. Timed kick samples were taken from 13 riffles and 4 pools once a month from June to November 1982. Riffle sites were classified according to temporal flow regime as permanent, intermittent (dry for less than 3 months), or dry (dry for over 3 months), and varied in size as a function of discharge. Ordination analysis (detrended correspondence analysis) showed that the structure of the benthic inverteb

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Cheng, Wei, Geng Sun, Lin-fang Du, Yan Wu, Qun-ying Zheng, Hong-xuan Zhang, Lin Liu, and Ning Wu. "Unpalatable weed Stellera chamaejasme L. provides biotic refuge for neighboring species and conserves plant diversity in overgrazing alpine meadows on the Tibetan Plateau in China." Journal of Mountain Science 11, no. 3 (May 2014): 746–54. http://dx.doi.org/10.1007/s11629-013-2729-y.

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Sgarzi, Serena, Sandra Brucet, Mireia Bartrons, Ignasi Arranz, Lluís Benejam, and Anna Badosa. "Factors Influencing Abundances and Population Size Structure of the Threatened and Endemic Cyprinodont Aphanius iberus in Mediterranean Brackish Ponds." Water 12, no. 11 (November 21, 2020): 3264. http://dx.doi.org/10.3390/w12113264.

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Aphanius iberus is an endemic cyprinodontoid fish species of Mediterranean ponds in danger of extinction. In this study, we studied some abiotic and biotic factors that can influence A. iberus’s size structure and density in Mediterranean brackish ponds. We sampled fish using fyke nets in 10 ponds of Empordà (Spain) during the spring season. Our results showed that a better ecological status (according to the Water Quality of Lentic and Shallow Ecosystems (QAELS) index), pond’s depth and pond’s isolation (reflected by an increase in total nitrogen) were related to larger individual sizes and m

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Litz, Marisa N. C., Robert L. Emmett, Paul J. Bentley, Andrew M. Claiborne, and Caren Barceló. "Biotic and abiotic factors influencing forage fish and pelagic nekton community in the Columbia River plume (USA) throughout the upwelling season 1999–2009." ICES Journal of Marine Science 71, no. 1 (June 19, 2013): 5–18. http://dx.doi.org/10.1093/icesjms/fst082.

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Abstract Litz, M. N. C., Emmett, R. L., Bentley, P. J., Claiborne, A. M., and Barceló, C. Biotic and abiotic factors influencing forage fish and pelagic nekton community in the Columbia River plume (USA) throughout the upwelling season 1999–2009. – ICES Journal of Marine Science, 71: . Large river plumes modify coastal environments and can impact production across multiple trophic levels. From 1999 to 2009, the assemblages of forage fish, predator fish, and other pelagic nekton were monitored in coastal waters associated with the Columbia River plume. Surveys were conducted at night to target

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Watson, Laurence H., Michael J. Cameron, and Fillemon Iifo. "Elephant herbivory of knob‐thorn ( Senegalia nigrescens ) and ivory palm ( Hyphaene petersiana ) in Bwabwata National Park, Caprivi, Namibia: The role of ivory palm as a biotic refuge." African Journal of Ecology 58, no. 1 (August 13, 2019): 14–22. http://dx.doi.org/10.1111/aje.12681.

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Fouquet, Antoine, Elodie A. Courtois, Daniel Baudain, Jucivaldo Dias Lima, Sergio Marques Souza, Brice P. Noonan, and Miguel T. Rodrigues. "The trans-riverine genetic structure of 28 Amazonian frog species is dependent on life history." Journal of Tropical Ecology 31, no. 4 (June 8, 2015): 361–73. http://dx.doi.org/10.1017/s0266467415000206.

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Abstract:Among the hypotheses formulated to explain the origin of Amazonian biodiversity, two (the riverine-barrier and the river-refuge hypotheses) focus on the role that rivers play as biotic barriers promoting speciation. However, empirical results have both supported and refuted these hypotheses. This is likely due, at least in part, to river-specific hydrologic characteristics and the biology of the focal species. The rivers of the Guiana Shield represent a model system because they have had more stable courses over time than those of the western Amazon Basin, where most tests of riverine

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Castro-Sanguino, C., YM Bozec, and PJ Mumby. "Dynamics of carbonate sediment production by Halimeda: implications for reef carbonate budgets." Marine Ecology Progress Series 639 (April 2, 2020): 91–106. http://dx.doi.org/10.3354/meps13265.

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Reef carbonate production and sediment generation are key processes for coral reef development and shoreline protection. The calcified green alga Halimeda is a major contributor of calcareous sediments, but rates of production and herbivory upon Halimeda are driven by biotic and environmental factors. Consequently, estimating rates of calcium carbonate (CaCO3) production and transformation into sediment requires the integration of Halimeda gains and losses across habitats and seasons, which is rarely considered in carbonate budgets. Using seasonal rates of recruitment, growth, senescence and h

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Tonn, William M., and Cynthia A. Paszkowski. "Habitat use of the central mudminnow (Umbra limi) and yellow perch (Perca flavescens) in Umbra-Perca assemblages: the roles of competition, predation, and the abiotic environment." Canadian Journal of Zoology 65, no. 4 (April 1, 1987): 862–70. http://dx.doi.org/10.1139/z87-137.

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We compared spatial distributions and diel activity patterns of three fish populations (co-occurring central mudminnows and yellow perch, and a mudminnow population in a single-species assemblage) throughout the year in two small, northern Wisconsin dystrophic lakes. In winter, all three populations were more active offshore and during the day. During spring and summer–fall all were concentrated inshore, near the bottom, and were more active around dawn and dusk. Winter distributions appeared to be responses to abiotic conditions (ice cover and low oxygen availability); overall patterns during

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Tronstad, Lusha M., J. Joseph Giersch, Scott Hotaling, Alisha A. Shah, Lydia H. Zeglin, Rebecca J. Bixby, H. Arthur Woods, and Debra S. Finn. "Long-term alpine stream monitoring in the Teton Range: Investigating multi-year patterns and thermal physiology." UW National Parks Service Research Station Annual Reports 42 (December 15, 2019): 97–103. http://dx.doi.org/10.13001/uwnpsrc.2019.5747.

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Alpine streams and the biotic communities they contain are imperiled worldwide due to climate warming and the rapid decline of ice. The loss of glaciers and permanent snowpack may drive local populations to extinction, especially organisms with narrow habitat tolerances. We have been monitoring alpine streams in the Teton Range since 2015 that originate from three hydrological sources: surface glaciers, snowfields, or subterranean ice (e.g., rock glaciers). We call these stream types glacier-fed, snowmelt-fed, and icy seeps, respectively. We hypothesize that icy seeps may persist on the landsc

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Calle-Rendón, Bayron R., Mika Peck, Sara E. Bennett, Citlalli Morelos-Juarez, and Felipe Alfonso. "Comparison of forest regeneration in two sites with different primate abundances in Northwestern Ecuador." Revista de Biología Tropical 64, no. 2 (May 13, 2016): 493. http://dx.doi.org/10.15517/rbt.v64i2.18415.

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There is increasing evidence that large-bodied primates play important roles as seed dispersers and in the maintenance of tree diversity in forest ecosystems. In this study we compared forest regeneration at two sites with differing primate abundances in the Ecuadorian Chocoan rainforest. We predicted: (1) significant differences in primate abundance between the two sites; (2) higher understory tree species richness and density at the site with greater primate abundance; (3) the site with lower primate abundance characterized by tree species dispersed by non-primate biotic agents and/or abioti

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Ackerly, David D., Matthew M. Kling, Matthew L. Clark, Prahlad Papper, Meagan F. Oldfather, Alan L. Flint, and Lorraine E. Flint. "Topoclimates, refugia, and biotic responses to climate change." Frontiers in Ecology and the Environment 18, no. 5 (June 2020): 288–97. http://dx.doi.org/10.1002/fee.2204.

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Jha, Shalene, Christopher M. Bacon, Stacy M. Philpott, V. Ernesto Méndez, Peter Läderach, and Robert A. Rice. "Shade Coffee: Update on a Disappearing Refuge for Biodiversity." BioScience 64, no. 5 (April 14, 2014): 416–28. http://dx.doi.org/10.1093/biosci/biu038.

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Clements, Cody S., and Mark E. Hay. "Competitors as accomplices: seaweed competitors hide corals from predatory sea stars." Proceedings of the Royal Society B: Biological Sciences 282, no. 1814 (September 7, 2015): 20150714. http://dx.doi.org/10.1098/rspb.2015.0714.

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Indirect biotic effects arising from multispecies interactions can alter the structure and function of ecological communities—often in surprising ways that can vary in direction and magnitude. On Pacific coral reefs, predation by the crown-of-thorns sea star, Acanthaster planci , is associated with broad-scale losses of coral cover and increases of macroalgal cover. Macroalgal blooms increase coral–macroalgal competition and can generate further coral decline. However, using a combination of manipulative field experiments and observations, we demonstrate that macroalgae, such as Sargassum poly

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Fischman, Robert L., Vicky J. Meretsky, Alexei Babko, Michael Kennedy, Lei Liu, Michelle Robinson, and Susan Wambugu. "Planning for Adaptation to Climate Change: Lessons from the US National Wildlife Refuge System." BioScience 64, no. 11 (October 7, 2014): 993–1005. http://dx.doi.org/10.1093/biosci/biu160.

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Dolby, Greer A., Ryan Hechinger, Ryan A. Ellingson, Lloyd T. Findley, Julio Lorda, and David K. Jacobs. "Sea-level driven glacial-age refugia and post-glacial mixing on subtropical coasts, a palaeohabitat and genetic study." Proceedings of the Royal Society B: Biological Sciences 283, no. 1843 (November 30, 2016): 20161571. http://dx.doi.org/10.1098/rspb.2016.1571.

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Using a novel combination of palaeohabitat modelling and genetic mixture analyses, we identify and assess a sea-level-driven recolonization process following the Last Glacial Maximum (LGM). Our palaeohabitat modelling reveals dramatic changes in estuarine habitat distribution along the coast of California (USA) and Baja California (Mexico). At the LGM (approx. 20 kya), when sea level was approximately 130 m lower, the palaeo-shoreline was too steep for tidal estuarine habitat formation, eliminating this habitat type from regions where it is currently most abundant, and limiting such estuaries

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Mulanda Aura, Christopher, Chrisphine S. Nyamweya, James M. Njiru, Reuben Omondi, Julius Manyala, Safina Musa, Horace Owiti, et al. "Using the Multi-metric Index of Biotic Integrity methodological approach to determine the major river catchment that most pollutes a lake." Aquatic Ecosystem Health & Management 24, no. 1 (January 2, 2021): 12–20. http://dx.doi.org/10.14321/aehm.024.01.04.

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Abstract We present the Multi-metric Index of Biotic Integrity methodological approach that allows for the ranking of major river catchments based on pollution status in the Kenyan portion of Lake Victoria, Africa. The study has a broader applicability to all of Lake Victoria, other African Great Lakes, and all lakes that have riverine discharge. The method presented utilizes water quality and environmental data, local knowledge, and pre-existing literature. The parameters considered were sampled from 2016 to 2018 during the dry season (July sampling) and the wet season (March sampling). Separ

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Anderson, Alex S., April E. Reside, Jeremy J. VanDerWal, Luke P. Shoo, Richard G. Pearson, and Stephen E. Williams. "Immigrants and refugees: the importance of dispersal in mediating biotic attrition under climate change." Global Change Biology 18, no. 7 (April 18, 2012): 2126–34. http://dx.doi.org/10.1111/j.1365-2486.2012.02683.x.

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Mota‐Ferreira, Mário, and Pedro Beja. "Combining geostatistical and biotic interaction model to predict amphibian refuges under crayfish invasion across dendritic stream networks." Diversity and Distributions 26, no. 6 (April 14, 2020): 699–714. http://dx.doi.org/10.1111/ddi.13047.

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Lescano, María Natalia, Alejandro G. Farji-Brener, Ernesto Gianoli, and Tomás A. Carlo. "Bottom-up effects may not reach the top: the influence of ant–aphid interactions on the spread of soil disturbances through trophic chains." Proceedings of the Royal Society B: Biological Sciences 279, no. 1743 (June 20, 2012): 3779–87. http://dx.doi.org/10.1098/rspb.2012.1066.

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Soil disturbances that increase nutrient availability may trigger bottom-up cascading effects along trophic chains. However, the strength and sign of these effects may depend on attributes of the interacting species. Here, we studied the effects of nutrient-rich refuse dumps of the leaf-cutting ant, Acromyrmex lobicornis , on the food chain composed of thistles, aphids, tending ants and aphid natural enemies. Using stable isotopes tracers, we show that the nitrogen accumulated in refuse dumps propagates upward through the studied food chain. Thistles growing on refuse dumps had greater biomass

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Olukanni, O. D., A. A. Osuntoki, and G. O. Gbenle. "Decolourization of Azo Dyes by a Strain of Micrococcus Isolated from a Refuse Dump Soil." Biotechnology(Faisalabad) 8, no. 4 (September 15, 2009): 442–48. http://dx.doi.org/10.3923/biotech.2009.442.448.

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REYAHI-KHORAM, MAHDI. "The threates on the biodiversity of Bisotun Wildlife Refuge and Bisotun Protected Area (BPA & BWR) in the west region of Iran." Biodiversitas, Journal of Biological Diversity 15, no. 1 (April 1, 2014): 67–74. http://dx.doi.org/10.13057/biodiv/d150110.

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Goeden, R. D., and L. T. Kok. "COMMENTS ON A PROPOSED “NEW” APPROACH FOR SELECTING AGENTS FOR THE BIOLOGICAL CONTROL OF WEEDS." Canadian Entomologist 118, no. 1 (January 1986): 51–58. http://dx.doi.org/10.4039/ent11851-1.

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AbstractThe “new approach” to selecting biological control agents, as proposed by Hokkanen and Pimentel in 1984, through the use of new exploiter–victim associations is inappropriate for the biological control of weeds because of certain misconceptions in their method. Examples of biological control of weeds cited in their analysis were biased towards cactaceous insects, and cacti are not representative of target weeds. Several of their “new” associations were inaccurate. These inaccuracies are discussed and additional examples are provided to refute the proposed method. Contrary to the recomm

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Kranzfelder, Petra, and Leonard C. Ferrington, Jr. "Chironomidae (Diptera) species diversity of estuaries across a land use gradient on the Caribbean coast of Costa Rica." Revista de Biología Tropical 66, no. 3 (July 4, 2018): 1118. http://dx.doi.org/10.15517/rbt.v66i3.31927.

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The family Chironomidae (Diptera) is the most widely distributed, most diverse, and often the most abundant of all families of benthic macroinvertebrates in aquatic ecosystems, including estuaries and other coastal marine ecosystems. Chironomid assemblages are likely to provide a useful measure of biotic integrity in estuaries of Costa Rica, which lack an intensive estuarine bioassessment tool to support environmental monitoring and regulatory programs. We characterized the taxonomic composition of Chironomidae, tested a Chironomidae Index of Biotic Integrity (CIBI) developed from extrinsic po

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Leonard, Steven W. J., Andrew F. Bennett, and Michael F. Clarke. "Determinants of the occurrence of unburnt forest patches: Potential biotic refuges within a large, intense wildfire in south-eastern Australia." Forest Ecology and Management 314 (February 2014): 85–93. http://dx.doi.org/10.1016/j.foreco.2013.11.036.

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B. Walker, Ryan, Jonathan D. Coop, William M. Downing, Meg A. Krawchuk, Sparkle L. Malone, and Garrett W. Meigs. "How Much Forest Persists Through Fire? High-Resolution Mapping of Tree Cover to Characterize the Abundance and Spatial Pattern of Fire Refugia Across Mosaics of Burn Severity." Forests 10, no. 9 (September 8, 2019): 782. http://dx.doi.org/10.3390/f10090782.

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Wildfires in forest ecosystems produce landscape mosaics that include relatively unaffected areas, termed fire refugia. These patches of persistent forest cover can support fire-sensitive species and the biotic legacies important for post-fire forest recovery, yet little is known about their abundance and distribution within fire perimeters. Readily accessible 30-m resolution satellite imagery and derived burn severity products are commonly employed to characterize post-fire landscapes; however, coarse image resolution, generalized burn severity thresholds, and other limitations can constrain

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Ribas, Camila C., Alexandre Aleixo, Afonso C. R. Nogueira, Cristina Y. Miyaki, and Joel Cracraft. "A palaeobiogeographic model for biotic diversification within Amazonia over the past three million years." Proceedings of the Royal Society B: Biological Sciences 279, no. 1729 (July 27, 2011): 681–89. http://dx.doi.org/10.1098/rspb.2011.1120.

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Many hypotheses have been proposed to explain high species diversity in Amazonia, but few generalizations have emerged. In part, this has arisen from the scarcity of rigorous tests for mechanisms promoting speciation, and from major uncertainties about palaeogeographic events and their spatial and temporal associations with diversification. Here, we investigate the environmental history of Amazonia using a phylogenetic and biogeographic analysis of trumpeters (Aves: Psophia ), which are represented by species in each of the vertebrate areas of endemism. Their relationships reveal an unforeseen

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Lacasse, Sylvain, and Pierre Magnan. "Biotic and Abiotic Determinants of the Diet of Brook Trout, Salvelinus fontinalis, in Lakes of the Laurentian Shield." Canadian Journal of Fisheries and Aquatic Sciences 49, no. 5 (May 1, 1992): 1001–9. http://dx.doi.org/10.1139/f92-112.

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From a survey of 12 lakes containing brook trout, Salvelinus fontinalis, 12 lakes containing brook trout and creek chub, Semotilus atromaculatus, and 13 lakes containing brook trout and white sucker, Catostomus commersoni, we built seven multiple linear regression models to account for the mean percent weight of different prey categories in the diet of brook trout. Presence of chub and sucker, zooplankton community structure, sampling date, morphoedaphic index, and the importance of rock outcrops accounted for 88% of the variation in weight of zoobenthos eaten by trout, which was the preferred

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AMATTA, EMILCE, LUIS A. CALCATERRA, and STELLA M. GIANNONI. "Ant species (Hymenoptera: Formicidae) in the three forests of the Ischigualasto Provincial Park, a protected area of the Monte Desert, Argentina." Biodiversitas Journal of Biological Diversity 19, no. 3 (May 1, 2018): 831–39. http://dx.doi.org/10.13057/biodiv/d190311.

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Amatta E, Calcaterra LA, Giannoni SM. 2018. Ant species (Hymenoptera: Formicidae) in the three forests of the Ischigualasto Provincial Park, a protected area of the Monte Desert, Argentina. Biodiversitas 19: 831-839. Deforestation and overgrazing mediated by the humans have caused a serious process of desertification in the Argentine Monte Desert, which threats biodiversity of this ecosystem. Forests provide important resources and refuge for animal species, such as ants. The objective of this work was to survey the ant fauna of dryland forests of Ischigualasto Provincial Park, a protected are

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Rhodes, Melissa C. "Comparative physiology of suspension feeding in living articulate brachiopods and bivalves - implications for large-scale evolutionary patterns." Paleontological Society Special Publications 6 (1992): 244. http://dx.doi.org/10.1017/s2475262200008042.

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The hypothesis that biotic interactions have escalated over geologic time suggests that taxonomic groups such as bivalves, which developed representatives with high-energy life habits, preempted resources and drove “obsolete” low-energy groups, such as articulate brachiopods, into ecological refugia. Articulates had been the dominant benthos in a broad range of Paleozoic habitats. Modern refugia include areas of darkness and low primary productivity, such as fjords, caves, and polar regions. If the escalation hypothesis is true, then the modern articulates concentrated in these habitats should

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Leigh, Catherine, Fran Sheldon, Richard T. Kingsford, and Angela H. Arthington. "Sequential floods drive 'booms' and wetland persistence in dryland rivers: a synthesis." Marine and Freshwater Research 61, no. 8 (2010): 896. http://dx.doi.org/10.1071/mf10106.

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Flow is a key driver regulating processes and diversity in river systems across a range of temporal and spatial scales. In dryland rivers, variability in the timing and scale of floods has specific ecological significance, playing a major role in sustaining biotic diversity across the river-floodplain mosaic. However, longitudinal effects of floods are equally important, delivering water downstream through channels and wetland complexes. Interaction among spatially distributed wetlands, their connecting channel and floodplain geomorphology and the temporally variable flow events not only creat

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Butler, Jack, and Jerrold Dodd. "Characterization of Relict Communities For Monitoring Park Ecosystems in Glen Canyon National Recreation Area." UW National Parks Service Research Station Annual Reports 13 (January 1, 1989): 67–69. http://dx.doi.org/10.13001/uwnpsrc.1989.2785.

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Grazing by domestic livestock is authorized on the Glen Canyon National Recreation Area and occurs on about 80% of the NRA lands. Concern over competing land uses has generated considerable interest in the direct and indirect effects of grazing on community structure and function (Kleiner and Harper 1972, 1977, Loope 1977, Jefferies and Klopatek 1987). The primary objectives of this study are to: (1) identify and evaluate the abiotic and biotic factors influencing the stucture and species composition of relict and grazed pinyonÂjuniper, black brush ricegrass, and ricegrass grassland communiti

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Burrows, Neil D. "Fire dependency of a rock-outcrop plant Calothamnus rupestris (Myrtaceae) and implications for managing fire in south-western Australian forests." Australian Journal of Botany 61, no. 2 (2013): 81. http://dx.doi.org/10.1071/bt12240.

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Granite outcrops embedded in south-western Australian forests provide habitat for unique biotic assemblages and refugia for fire-sensitive taxa. Discontinuous vegetation and natural barriers to fire spread enable outcrops to function as fire refugia, provided fires in the surrounding forest are not of high intensity. In Summer 2003, lightning started a fire in jarrah forest that had not been burnt for almost 20 years. The high-intensity fire burned the vegetation on Mount Cooke, a large granite outcrop, providing an opportunity to study the response of Calothamnus rupestris Schauer, a fire-sen

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Pratt, Thomas C., and Michael G. Fox. "Biotic influences on habitat selection by young-of-year walleye (Stizostedion vitreum) in the demersal stage." Canadian Journal of Fisheries and Aquatic Sciences 58, no. 6 (June 1, 2001): 1058–69. http://dx.doi.org/10.1139/f01-054.

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The influence of prey availability and predation risk on the distribution of young-of-year (YOY) walleye (Stizostedion vitreum) was investigated by comparing species associations with the relative abundance of YOY walleye across nine habitat types using an underwater visual assessment technique. During the early demersal period (mid-June to mid-July), YOY walleye were found primarily in areas of high macrophyte cover at 25 m depth. YOY walleye abundance was positively correlated with the abundance of prey fishes at this time. YOY walleye shifted to low-cover, shallow areas during the late dem

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Reid, Michael A., Martin C. Thoms, Stephen Chilcott, and Kathryn Fitzsimmons. "Sedimentation in dryland river waterholes: a threat to aquatic refugia?" Marine and Freshwater Research 68, no. 4 (2017): 668. http://dx.doi.org/10.1071/mf15451.

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In dryland river systems subject to prolonged low and no flow periods, waterholes, or sections of river channel that are deep relative to the rest of the channel and that retain water for longer periods of no flow, provide refugia for aquatic biota and hence are critical to the resilience of aquatic ecosystems. This study examined physical, chemical and bio-stratigraphy in refugial waterholes situated along four distributaries of the Lower Balonne River system in semi-arid Australia. In doing so we reconstructed environmental histories for the waterholes, calculated how sedimentation rates hav

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ISMAIL, SITI NORASIKIN, MUZZALIFAH ABD HAMID, and MASHHOR MANSOR. "Ecological correlation between aquatic vegetation and freshwater fish populations in Perak River, Malaysia." Biodiversitas Journal of Biological Diversity 19, no. 1 (January 1, 2018): 279–84. http://dx.doi.org/10.13057/biodiv/d190138.

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Ismail SN, Abd Hamid M, Mansor M. 2018. Ecology, diversity and seasonal distribution of wild mushrooms in a Nigerian tropical forest reserve. Biodiversitas 19: 279-284. Aquatic plants play a crucial role in an aquatic ecosystem partly because these plant communities provide suitable habitats and food items to other aquatic organisms especially fish. Many fish communities use vegetation as breeding sites, nurseries and refuges for their juveniles. Therefore, this study was conducted to provide baseline data on the correlation between the aquatic plants and freshwater fishes in Perak River. Base

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Tronstad, Lusha, J. Joseph Giersch, Scott Hotaling, Lydia Zeglin, Oliver Wilmot, Rebecca J. Bixby, and Debra S. Finn. "Establishing a long-term monitoring network for assessing potential climatic refugia in cold alpine streams." UW National Parks Service Research Station Annual Reports 40 (December 15, 2017): 69–78. http://dx.doi.org/10.13001/uwnpsrc.2017.5581.

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Managing landscapes to maintain climate refugia is likely the best strategy to promote persistence of temperature-sensitive species with limited dispersal capacity. Rare, cold-stenothermic taxa occupy mosaic mountain stream networks due largely to hydrological source heterogeneity. We collected environmental and biological data from alpine streams in the Teton Range, Wyoming representing runoff from snowpack (N=3), glaciers (N=4) and subterranean ice (N=4), every summer from 2015-2017. We quantified differences in habitat among the streams according to a glaciality index that included bed stab

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Conran, John G., William G. Lee, Daphne E. Lee, Jennifer M. Bannister, and Uwe Kaulfuss. "Reproductive niche conservatism in the isolated New Zealand flora over 23 million years." Biology Letters 10, no. 10 (October 2014): 20140647. http://dx.doi.org/10.1098/rsbl.2014.0647.

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The temporal stability of plant reproductive features on islands has rarely been tested. Using flowers, fruits/cones and seeds from a well-dated (23 Ma) Miocene Lagerstätte in New Zealand, we show that across 23 families and 30 genera of forest angiosperms and conifers, reproductive features have remained constant for more than 20 Myr. Insect-, wind- and bird-pollinated flowers and wind- and bird-dispersed diaspores all indicate remarkable reproductive niche conservatism, despite widespread environmental and biotic change. In the past 10 Myr, declining temperatures and the absence of low-latit

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Xing, Lida, and Martin G. Lockley. "Theropod tracks from the Jurassic–Cretaceous boundary, Tuchengzi Formation, Chengde, China: Review and new observations." Biosis: Biological Systems 2, no. 2 (June 22, 2021): 271–82. http://dx.doi.org/10.37819/biosis.002.02.0102.

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Previously known theropod dinosaur footprints preserved as natural casts in the Tuchengzi Formation, on a rock wall beside the railway in Nanshuangmiao Village, Shangbancheng Town, Chengde City, were originally assigned to ichnogenus Anchisauripus and tentatively attributed to oviraptosaurs. The assemblage was restudied in more detail by examining the entire assemblage of 55 tracks associated with two horizons. The size range of the 27 measured tracks suggests a more diverse grallatorid–eubrontid assemblage and potentially greater diversity of theropod trackmakers. The label Anchisauripus, whi

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