Relevant bibliographies by topics / Species abundance counts

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Species abundance counts'

Author: Grafiati
Published: 19 February 2023
Last updated: 20 February 2023

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Journal articles on the topic "Species abundance counts"

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Toms, Judith D., Fiona K. A. Schmiegelow, Susan J. Hannon, and Marc-André Villard. "Are Point Counts of Boreal Songbirds Reliable Proxies for More Intensive Abundance Estimators?" Auk 123, no. 2 (2006): 438–54. http://dx.doi.org/10.1093/auk/123.2.438.

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AbstractPoint counts are often used to provide information on abundance of songbirds. If data from point counts are to be compared in space or time, however, any bias in the estimate should be consistent and linearly related to the true abundance. Several studies have suggested that this assumption may be violated for songbirds. Here, we used double sampling to test whether point counts are linearly related to true abundance, as estimated from spot mapping, for 12 songbird species in the boreal mixed-wood forest of northern Alberta, Canada. We found that total abundance of birds across several
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Plug, Cornelis, and Ina Plug. "MNI Counts as Estimates of Species Abundance." South African Archaeological Bulletin 45, no. 151 (1990): 53. http://dx.doi.org/10.2307/3887918.

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Patterson, R. Timothy, and Evan Fishbein. "Re-examination of the statistical methods used to determine the number of point counts needed for micropaleontological quantitative research." Journal of Paleontology 63, no. 2 (1989): 245–48. http://dx.doi.org/10.1017/s0022336000019272.

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Currently some controversy exists in the micropaleontological community concerning the statistically correct number of counts required for quantitative examinations, particularly with respect to the effect of variations in the number of species between samples and the significance of varying fractional abundances on the reliability of results. This analysis of the various statistical methods used to determine the number of required counts has shown that the number of species has no relationship to the number of counts required to measure accurately fractional abundances. As part of the study,
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Ma, Yuanjing, Yuan Luo, and Hongmei Jiang. "A novel normalization and differential abundance test framework for microbiome data." Bioinformatics 36, no. 13 (2020): 3959–65. http://dx.doi.org/10.1093/bioinformatics/btaa255.

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Abstract Motivation Microbial communities have been proved to have close relationship with many diseases. The identification of differentially abundant microbial species is clinically meaningful for finding disease-related pathogenic or probiotic bacteria. However, certain characteristics of microbiome data have hurdled the accuracy and effectiveness of differential abundance analysis. The abundances or counts of microbiome species are usually on different scales and exhibit zero-inflation and over-dispersion. Normalization is a crucial step before the differential abundance test. However, exi
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Lasky, Jesse R., and Timothy H. Keitt. "Abundance of Panamanian dry-forest birds along gradients of forest cover at multiple scales." Journal of Tropical Ecology 26, no. 1 (2009): 67–78. http://dx.doi.org/10.1017/s0266467409990368.

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Abstract:Community structure and species’ abundances may be strongly correlated to patterns of forest cover, although such patterns are poorly known for tropical dry-forest birds, especially for those in Panamanian dry forests. Birds were distance-sampled during point counts in five dry-forest fragments in Panama. Distance from point count to forest edge and forest coverage at three spatial scales (500, 1000 and 2000-m radius) were compared as covariate predictors of the abundance of avian species and guilds. Each covariate was selected in at least two models of species or guild abundance. Abu
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Tiwari, Govind, Puneet Pandey, Rahul Kaul, Hang Lee, and Randeep Singh. "Comparison of point and roadside transect methods to evaluate the abundance and richness of diurnal raptors in the arid region of Rajasthan." PLOS ONE 16, no. 12 (2021): e0259805. http://dx.doi.org/10.1371/journal.pone.0259805.

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Diurnal raptors show a wider distribution compared to other groups of birds including passerines, woodpeckers, and seriemas, but occur at lower-than-expected densities. Estimating the precise abundance is essential to achieve conservation goals but the methods used to estimate the populations of birds need to be appropriate to arrive at meaningful conclusions. We compared the two survey methods: roadside point count and strip transects, for estimating species richness and abundance of raptors in the arid landscape of Rajasthan. Roadside point counts and roadside strip transects were done on 50
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Lakew, Biniam T., Adrian H. Nicholas, and Stephen W. Walkden-Brown. "Spatial and temporal distribution of Culicoides species in the New England region of New South Wales, Australia between 1990 and 2018." PLOS ONE 16, no. 4 (2021): e0249468. http://dx.doi.org/10.1371/journal.pone.0249468.

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Culicoides are one of the smallest hematophagous flies measuring 1–5 mm in size with only females seeking blood for egg development. The present study investigated spatio-temporal distribution of Culicoides species trapped between 1990 and 2018 at 13 sites in the New England region of NSW, Australia using automated light traps. Trapping locations were divided into three subregions (tablelands, slopes and plains). Nineteen Culicoides species were identified. Culicoides marksi and C. austropalpalis were the most abundant and widespread species. Culicoides brevitarsis, the principal vector of liv
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Buckland, Stephen T., Stuart J. Marsden, and Rhys E. Green. "Estimating bird abundance: making methods work." Bird Conservation International 18, S1 (2008): S91—S108. http://dx.doi.org/10.1017/s0959270908000294.

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SummaryIn many bird monitoring surveys, no attempt is made to estimate bird densities or abundance. Instead, counts of one form or another are made, and these are assumed to correlate with bird density. Unless complete counts on sample plots are feasible, this approach can easily lead to false conclusions, because detectability of birds varies by species, habitat, observer and many other factors. Trends in time of counts often reflect trends in detectability, rather than trends in abundance. Conclusions are further compromised when surveys are conducted at unrepresentative sites. We consider h
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Diefenbach, Duane R., Matthew R. Marshall, Jennifer A. Mattice, and Daniel W. Brauning. "Incorporating Availability for Detection in Estimates of Bird Abundance." Auk 124, no. 1 (2007): 96–106. http://dx.doi.org/10.1093/auk/124.1.96.

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Abstract Several bird-survey methods have been proposed that provide an estimated detection probability so that bird-count statistics can be used to estimate bird abundance. However, some of these estimators adjust counts of birds observed by the probability that a bird is detected and assume that all birds are available to be detected at the time of the survey. We marked male Henslow's Sparrows (Ammodramus henslowii) and Grasshopper Sparrows (A. savannarum) and monitored their behavior during May-July 2002 and 2003 to estimate the proportion of time they were available for detection. We found
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Sheffield, Lisa M., Adrian E. Gall, Daniel D. Roby, David B. Irons, and Katie M. Dugger. "Monitoring planktivorous seabird populations: validating surface counts of crevice-nesting auklets using mark–resight techniques." Canadian Journal of Zoology 84, no. 6 (2006): 846–54. http://dx.doi.org/10.1139/z06-061.

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Least Auklets ( Aethia pusilla (Pallas, 1811)) are the most abundant species of seabird in the Bering Sea and offer a relatively efficient means of monitoring secondary productivity in the marine environment. Counting auklets on surface plots is the primary method used to track changes in numbers of these crevice-nesters, but counts can be highly variable and may not be representative of the number of nesting individuals. We compared average maximum counts of Least Auklets on surface plots with density estimates based on mark–resight data at a colony on St. Lawrence Island, Alaska, during 2001
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Dissertations / Theses on the topic "Species abundance counts"

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Hurst, Cameron. "Factors Affecting the Power and Validity of Randomization-Based Multivariate Tests for Difference among Ecological Assemblages." Thesis, Griffith University, 2005. http://hdl.handle.net/10072/366731.

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Ecologists often want to determine whether there is a difference between the assemblage occupying one habitat, and that in another. While a number of studies have compared a variety of the multivariate techniques used in community ecology, few have considered the ability of different inferential multivariate techniques to detect differences among ecological assemblages. Those that have considered differences among various techniques have focused on model properties, giving little attention to the comparative power of such techniques when applied to ecological datasets. The primary aim of this
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Price, Jessica. "Species Richness, Diversity, and Abundance of Sponge Communities in Broward County, Florida, 2000-2015." Thesis, NSUWorks, 2018. https://nsuworks.nova.edu/occ_stuetd/494.

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Sponges (Porifera) are a major component of coral reef ecosystems. They outnumber coral species on the Florida Reef Tract, and in places, account for more living cover. Because coral reefs are a vital part of Florida’s economy, it is important to understand how local sponge assemblages vary spatially and temporally, especially as corals continue to decline. However, long-term observations of sponge assemblages (species richness, diversity and abundance) are lacking. To address this, annual photoquadrats were analyzed from a series of 25 sites off Broward County between 2000 and 2015. Variation
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Grouios, Christopher. "Comparing the Use of Abundance and Consistent Occupancy Measures to Predict Local Species Persistence." Thesis, 2009. http://hdl.handle.net/1807/25702.

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I compared the utility of two continuous time-series data measures for applied conservation biology by investigating how well each could predict future local persistence of a diverse set of bird species. I used 37 years of data from the North American Breeding Bird Survey to calculate abundance from yearly point-counts and permanence (i.e., consistent occupancy over time) from yearly presence-absence data in the early portion of the study period, then used the later portion of data to empirically evaluate how well each measure predicted persistence two decades into the future. I found that per
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Books on the topic "Species abundance counts"

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Ellam, Rob. 4. Measuring isotopes. Oxford University Press, 2016. http://dx.doi.org/10.1093/actrade/9780198723622.003.0004.

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‘Measuring isotopes: counting the atoms’ explores how isotopes are measured. For stable isotopes, atoms of each isotope are counted using a mass spectrometer. This turns atoms into charged ions and separates them into the different isotopic species using a mass filter. Precise measurements of isotopic abundance can be achieved in a few minutes or hours. Mass spectrometry could be used for radioactive isotopes, but for short-lived isotopes, their low abundance often makes them difficult to detect. The alternative is to use nuclear spectroscopy or counting methods to detect the characteristic en
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Dolby, Tim, and Rohan Clarke. Finding Australian Birds. CSIRO Publishing, 2014. http://dx.doi.org/10.1071/9781486300846.

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Finding Australian Birds is a guide to the special birds found across Australia's vastly varied landscapes. From the eastern rainforests to central deserts, Australia is home to some 900 species of birds. This book covers over 400 Australian bird watching sites conveniently grouped into the best birding areas, from one end of the country to the other. This includes areas such as Kakadu in the Top End and rocky gorges in the central deserts of the Northern Territory, the Great Barrier Reef in Queensland, rainforests distributed along the eastern Australian seaboard, some of the world's tallest
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Mills, M. G. L., and M. E. J. Mills. Coexistence and the cheetah’s relations with other carnivores. Oxford University Press, 2017. http://dx.doi.org/10.1093/oso/9780198712145.003.0009.

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In the southern Kalahari densities of large carnivores are relatively low, with the brown hyena the most abundant. Resource partitioning is well defined as each species tends to concentrate on the prey species it is best adapted to utilize, and they show dietary flexibility. Interactions between cheetahs and other large carnivores were rare and mostly inconsequential. Only 6.1% of kills were kleptoparasitized, with an average percentage loss of 65% per kill. Nearly all (82.6%) kills stolen, were stolen at night, were springbok, and the perpetrators were mainly lions and brown hyenas. Diurnal h
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Biggins, Dean E., and David A. Eads. Evolution, natural history, and conservation of black-footed ferrets. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198759805.003.0015.

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Black-footed ferrets were reduced to a remnant population of 10 in 1985 due to diseases (plague, canine distemper), but successful captive breeding and releases have improved the prospects for ferret recovery. Comparisons between black-footed ferrets and Siberian polecats, close relatives that can interbreed and produce fertile offspring, allow the following evolutionary speculation. Predation on ferrets and polecats tends to narrow their niches and promote specialization due to requirements for escape habitats. In Asia, that influence is countered by the larger and more diverse area of steppe
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Book chapters on the topic "Species abundance counts"

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Quicke, Donald L. J., Buntika A. Butcher, and Rachel A. Kruft Welton. "Species abundance, accumulation and diversity data." In Practical R for biologists: an introduction. CABI, 2021. http://dx.doi.org/10.1079/9781789245349.0018.

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Abstract Ecologists in particular are often interested in the species richness and diversity of groups of organisms, ranging from studies of small ecosystems to global patterns. In most cases it is not possible to count every individual or to detect every species, and so they use a variety of estimation methods and summary statistics that will be briefly introduce in this chapter. This chapter covers estimating species abundance and species richness by looking at accumulation curves. Analyzing diversity using tests such as the Shannon and Simpson diversity indices are also discussed. Finally, patterns of niche partitioning using the broken stick model are created. An example is shown, using transect surveys of butterflies in Papua New Guinea.
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Quicke, Donald L. J., Buntika A. Butcher, and Rachel A. Kruft Welton. "Species abundance, accumulation and diversity data." In Practical R for biologists: an introduction. CABI, 2021. http://dx.doi.org/10.1079/9781789245349.0200.

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Abstract Ecologists in particular are often interested in the species richness and diversity of groups of organisms, ranging from studies of small ecosystems to global patterns. In most cases it is not possible to count every individual or to detect every species, and so they use a variety of estimation methods and summary statistics that will be briefly introduce in this chapter. This chapter covers estimating species abundance and species richness by looking at accumulation curves. Analyzing diversity using tests such as the Shannon and Simpson diversity indices are also discussed. Finally, patterns of niche partitioning using the broken stick model are created. An example is shown, using transect surveys of butterflies in Papua New Guinea.
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Saayman, Andrea, and Melville Saayman. "The valuation of elephant sightings in protected areas." In The elephant tourism business. CABI, 2021. http://dx.doi.org/10.1079/9781789245868.0016.

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Abstract The research presented in this chapter determines the value that tourists on safari in protected areas in South Africa attach to elephant sightings and the relative importance of the elephant sighting compared with the other species in the Big Five. The study also determines whether tourists take the increased poaching of elephants - also in South Africa - into account when revealing their choice. Using information from five surveys conducted at different parks in South Africa from 2011 to 2013 and again in 2019, the elephant was found to be the fourth preferred species in the Big Five. The exception is Addo Elephant National Park, where the elephants are the second most preferred species. To determine the value that tourists attached to a sighting, contingent valuation was used. Although approximately a quarter to a third of respondents indicated positive amounts for a sighting across the years, the mean willingness to pay (WTP) reflects the scarcity of the species. The elephant is relatively abundant in all the parks and, in many instances, much easier to spot than the leopard or lion. It is therefore not surprising that the mean valuation of a sighting is much lower than that of the leopard and lion throughout all the years. Although tougher economic conditions in the country also influence WTP, it was found that tourists to South Africa's National Parks do not yet take the increased poaching of elephants into account when revealing their choice, nor in their valuation.
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Beggel, Sebastian, Joachim Pander, and Jürgen Geist. "Ecological Indicators for Surface Water Quality - Methodological Approaches to Fish Community Assessments in China and Germany." In Terrestrial Environmental Sciences. Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-80234-9_2.

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AbstractAssessments of aquatic ecosystem health rely increasingly on biological indicators such as fish community structure, but national approaches differ. To use bioindicators efficiently and to allow cross-country comparisons, standardized tools and methods are required. Within this study, currently applied procedures for stream ecosystem assessment in China and Germany are summarized and active and passive fish sampling methodologies used in both countries are investigated. The methodological comparison was based on the results of a joint Chinese German workshops within the SINOWATER project in 2016. A joint sampling campaign was then conducted in 2017 at 6 representative sites within 70 km of the Fan River, a tributary to the Liao River System in Liaoning province, China. Active methods comprised single-pass electrofishing methods as typically applied in Germany and China as well as seining. As passive methods, common minnow traps, gill-netting and longline-fishing were used. To allow the comparability between methods, a standardized sampling design comprising several replicates at each site was chosen, covering a range of different ecological stream conditions. By comparison of the different fishing methodologies, electrofishing yielded the best overall results to assess fish biodiversity in terms of species abundance, richness and catch per unit effort. Differences in the effectiveness of the different electrofishing approaches mostly depended on the power source used. To cover the full spectrum of the fish community and to detect very rare species, a combination of different active and passive methods was most useful. If electrofishing is the method of choice, it is very important to adjust the gear power to river specific conditions such as flow, size and depth. The results of this joint Chinese-German study may aid in the selection of suitable sampling methods for fish community assessments in the future.
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"Biology, Management, and Conservation of Lampreys in North America." In Biology, Management, and Conservation of Lampreys in North America, edited by Abel F. Brumo, Leo Grandmontagne, Steven N. Namitz, and Douglas F. Markle. American Fisheries Society, 2009. http://dx.doi.org/10.47886/9781934874134.ch12.

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<em>Abstract</em>.—We evaluated two methods for assessing Pacific lamprey <em>Lampetra tridentata</em> spawning populations (visual counts of spawning adults and redds) and one method for assessing larval production (emergent ammocoete counts from drift nets) in the South Fork Coquille River, Oregon in 2004 and 2005. All three methods generally provided similar portrayals of timing, duration, and magnitude of spawning, including greater abundance in 2004 and seasonally bimodal spawning in 2005. We found a linear relationship between adult and redd counts but a high redd to adult ratio that varied seasonally in both years. The high redd to adult ratio can be attributed to short residence time in spawning areas and temperature or habitat-dependent differences in detection of adults, both of which can undermine adult count data. Redds had relatively longer persistence and larger numbers compared to adults and therefore may be a more practical survey method, but variable redd shape, size, and age, as well as superimposition, presented significant counting errors. Both adult and redd counts had no clear-cut way to quantify errors. Sampling emergent ammocoetes in the drift allowed detection of low density early and late season spawning and would be the preferred survey method when surveys of spawning adults and redds are impractical due to river size, visibility, or access. Even when spawning surveys are practical, emergent ammocoete counts may be better for detecting and monitoring small populations. Disadvantages of ammocoete sampling include nighttime work hours, extra laboratory time, and difficulties with species identification. The general absence of a stock–recruit relationship in lampreys means adult and redd counts are poor predictors of ammocoete production and emergent ammocoete abundance is a poor predictor of spawning abundance. The relationship breaks down because of variability in early survival, which is best detected using data from both spawning surveys and larval drift samples.
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Veech, Joseph A. "Analysis of the Habitat Associations of a Hypothetical Beetle Species." In Habitat Ecology and Analysis. Oxford University Press, 2021. http://dx.doi.org/10.1093/oso/9780198829287.003.0008.

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A dataset for a hypothetical ground-dwelling beetle species is used to illustrate five methods of habitat analysis: (1) comparison of group means, (2) multiple linear regression, (3) multiple logistic regression, (4) classification and regression trees, and (5) principal components analysis. The dataset consists of abundance (counts of individuals) recorded in each of 100 small survey plots located throughout forested study sites. The following environmental predictor variables were measured in each plot: percentage canopy cover, depth of leaf litter, volume of woody debris, ratio of oak to non-oak trees, and soil type. Techniques for assessing normality of each variable and multicollinearity among variables are discussed and recommended prior to conducting the habitat analysis. Assumptions, strengths, and weaknesses of each method are discussed.
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Veech, Joseph A. "Types of Data and the General Framework of Analysis." In Habitat Ecology and Analysis. Oxford University Press, 2021. http://dx.doi.org/10.1093/oso/9780198829287.003.0005.

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For most habitat analyses, researchers typically collect and examine environmental data from the landscape scale (a few square kilometers to hundreds of square kilometers) all the way down to the scale of a microhabitat (tens of square meters). At the larger spatial extents, the data may be GIS-based such as spatially referenced land cover data. At smaller spatial scales, the data may be collected (variables measured) in the field at the study sites. Data for a habitat analysis are often based on randomly located and spatially delineated sampling or survey plots. The environmental data compose a set of a few to tens of predictor variables that are used in statistical tests for a relationship with the response variable that is typically species presence–absence, abundance (counts of individuals), or activity level. Depending on the spatial scale of analysis, predictor variables could represent different environmental variables such as vegetation structure, soil properties, and other characteristics of the substrate. Climate and weather variables are environmental, but they are not considered to be characteristics of the habitat. The formal habitat analysis consists of testing for a statistical relationship between the response variable and one or more environmental predictor variables so as to identify those variables that truly are habitat characteristics. A study of the habitat of the brown-throated sloth in Costa Rica is used to further explain the type of data used in characterizing the habitat of a species.
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"Black Bass Diversity: Multidisciplinary Science for Conservation." In Black Bass Diversity: Multidisciplinary Science for Conservation, edited by Katie L. Woodside, Christopher J. Paxton, and NicoLe C. KierL. American Fisheries Society, 2015. http://dx.doi.org/10.47886/9781934874400.ch14.

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<em>Abstract</em>.—We conducted a stock assessment of Shoal Bass <em>Micropterus cataractae</em> in the upper Chipola River in Jackson and Calhoun counties, Florida from 2007 to 2012 to aid in the species’ conservation. Shoal Bass are currently listed as a species of special concern by the American Fisheries Society and are a recreational sport fish species in Florida. Previous Shoal Bass research in Florida was limited in terms of quantified habitat use or population abundance. Although one of the potential threats to Shoal Bass in the Chipola River has been described as sedimentation, little information existed regarding abundance, growth, mortality, or fishing effort. Shoal Bass and sympatric Largemouth Bass <em>M. salmoides</em> were collected by electrofishing from three study reaches. Modified Schnabel population estimates from mark– recaptured fish were used to describe abundance in 2009, 2010, and 2011. A roving creel survey was conducted in 2010 and 2011 to provide effort, total catch, catch per unit effort (fish caught per angler-hour), and harvest estimates. Mean total length at age was described by von Bertalanffy growth curves for Shoal Bass collected in 2008 and 2010, and growth differed between years. Total annual mortality (<EM>A</EM>) for Shoal Bass averaged 57% and was greater than total annual mortality for Largemouth Bass (<EM>A </EM>= 32%, <EM>P </EM>= 0.009) at this system. Missing or underrepresented year-classes from the 2008 and 2010 Shoal Bass age samples suggested highly variable recruitment. Strong Shoal Bass year-classes were associated with low median flows and low flow variation in spring and summer. An abundant population of Shoal Bass exists in the Chipola River, and the fishery received low angling harvest and directed effort. However, Shoal Bass remain potentially threatened by sedimentation, variable hydrologic events, and its confined range and habitat requirements.
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K. Nkwabi, Ally, John K. Bukombe, Hamza K. Kija, Steven D. Liseki, Sood A. Ndimuligo, and Pius Y. Kavana. "Avifauna in Relation to Habitat Disturbance in Wildlife Management Areas of the Ruvuma Miombo Ecosystem, Southern Tanzania." In Birds - Challenges and Opportunities for Business, Conservation and Research. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.97332.

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Understanding of relative distribution of avifauna provides insights for the conservation and management of wildlife in the community managed areas. This study examined relative diversity, abundance, and distribution of avifauna in selected habitat types across five Wildlife Management Areas of the Ruvuma landscape in miombo vegetation, southern Tanzania. Five habitat types were surveyed during the study: farmland, swamps, riverine forest, dense and open woodland. Transect lines, mist-netting, and point count methods were used to document 156 species of birds in the study sites. Descriptive statistics and Kruskal-Wallis tests were used to compare species richness and diversity across habitat types. We found differences in avifaunal species distribution in the study area whereby farmland had the highest abundance of avifauna species and lowest in the riverine forest. These results suggest that variations of avifauna species abundance, diversity, and distribution could be attributed by human activities across habitat types; due to the reason that habitats with less human encroachment had good species diversity and richness. Therefore, to improve avitourism and avoid local extinction of species, we urge for prompt action to mitigate species loss by creating awareness in the adjacent community through conservation education on the importance of protecting such biodiversity resources.
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Timm, Robert M., and Richard K. LaVal. "Mammals." In Monteverde. Oxford University Press, 2000. http://dx.doi.org/10.1093/oso/9780195095609.003.0013.

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Costa Rica is one of the most biotically diverse countries on earth, with 4% of known terrestrial plant and animal species in only 0.04% of the world’s land surface. The country’s mammal fauna is equally diverse, with more than 207 species (4.8% of the world’s 4629 species) in an area of 51,022 km2. The majority of the world’s mammal species and Monteverde’s fauna are small (< 0.5 kg), nocturnal, and secretive. We know considerably less about most neotropical mammals and other vertebrates than we do about birds, which are more easily observed and communicate with sounds audible to humans. Although certain species of mammals have been studied in Costa Rica (Janzen 1983a, Timm 1994, Vaughan and Rodríguez 1994), and Monteverde is one of the best-known regions of the country biologically, there has been little work on the ecology, distribution, abundance, altitudinal zonation, systematic relationships, and biogeography of most mammals. Deforestation and other human disturbances have had a significant impact on the native mammals of the region; knowledge of Monteverde’s mammals is vital to understand how habitat changes affect tropical montane mammals. In this chapter, we provide an overview of the mammal fauna of the Monteverde area. We discuss the biology and abundance of some of the area’s species, document how these are changing, and explore conservation issues. Most of the research on mammals at Monteverde has centered on bats or rodents, the two most diverse groups. Much of our knowledge of other species consists of isolated observations. We augment published reports with unpublished observations made by ourselves and colleagues. We also examined most of the Monteverde mammal specimens in museum collections to verify species identifications and to understand better their systematics, ecology, and distribution. We integrate this information into a list of the mammals that occur in the region, document their occurrence in each life zone, and estimate their overall abundance.
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Conference papers on the topic "Species abundance counts"

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alrajhi, Khazna. "Biodiversity of Arbuscular Mycorrhizal Fungi in Plant Roots and Rhizosphere Soil from different arid locations of Qatar." In Qatar University Annual Research Forum & Exhibition. Qatar University Press, 2021. http://dx.doi.org/10.29117/quarfe.2021.0060.

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Recently more attention or interest has been developed towards the role of Arbuscular Mycorrhizal Fungi (AMF) in plant growth. Qatar, which is a part of the Arabian Gulf region, is mostly arid with hot and dry climatic conditions. The current research aims to investigate the Occurrence, species composition and abundance of AMF in Qatar, for which rhizosphere soil samples and roots of 16 plants belonging to 12 families from eight locations were collected. The AMF from different samples were identified based on the sequencing of the PCR product of the amplified conserved ITS region. The results
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Grudzinska, Ieva, and Megija Florentīne. "Diatom-based assessment of the ecological status of the Venta River, Kuldīga." In 80th International Scientific Conference of the University of Latvia. University of Latvia, 2023. http://dx.doi.org/10.22364/iarb.2022.02.

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Pressure from land use patterns, climate change, and urbanisation on rivers is an important socio-ecological issue that requires management and biomonitoring. The ecologi-cal status of the Venta River at Kuldīga was assessed using bioindicators, specifically diatoms, which are widely used in monitoring of streams and rivers worldwide, especially in European countries. Ecological status was defined by calculating Specific Pollution Sensitivity Index (IPS). In addition, diatom diversity was determined in the studied part of the river. A total of six sam-pling sites were selected along a 10 km st
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Reports on the topic "Species abundance counts"

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Muxo, Robert, Kevin Whelan, Raul Urgelles, Joaquin Alonso, Judd Patterson, and Andrea Atkinson. Biscayne National Park colonial nesting birds monitoring protocol—Version 1.1. National Park Service, 2022. http://dx.doi.org/10.36967/nrr-2290141.

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Breeding colonies of wading birds (orders Ciconiiformes, Pelecaniformes) and seabirds (orders Suliformes, Pelecaniformes) serve as important indicators of aquatic ecosystem health, as they respond to changes in food abundance and quality, contaminants, invasive species, and disturbance. The Comprehensive Everglades Restoration Plan, Restoration Coordination & Verification program (CERP-RECOVER) has identified wading-bird colonies as an important ecosystem restoration indicator. The National Park Service South Florida/Caribbean Inventory & Monitoring Network (SFCN) ranked colonial nesti
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Peitz, David. Bird community monitoring at Pea Ridge National Military Park, Arkansas: Status report 2008–2021. Edited by Tani Hubbard. National Park Service, 2022. http://dx.doi.org/10.36967/2294263.

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Breeding bird surveys were initiated on Pea Ridge National Military Park, Arkansas in 2008 to assess temporal changes in the species composition and abundance of birds on the park. These data also improve our understanding of relationships between breeding birds and their habitat and the effects of management actions, such as invasive plant species control and tree thinning, on bird populations. Birds were sampled using point counts with 99 variable circular plots located on a systematic grid of 400 x 400-m cells (originating from a random start point). All birds seen or heard on a plot during
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Guilfoyle, Michael, Ruth Beck, Bill Williams, et al. Birds of the Craney Island Dredged Material Management Area, Portsmouth, Virginia, 2008-2020. Engineer Research and Development Center (U.S.), 2022. http://dx.doi.org/10.21079/11681/45604.

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This report presents the results of a long-term trend analyses of seasonal bird community data from a monitoring effort conducted on the Craney Island Dredged Material Management Area (CIDMMA) from 2008 to 2020, Portsmouth, VA. The USACE Richmond District collaborated with the College of William and Mary and the Coastal Virginia Wildlife Observatory, Waterbird Team, to conduct year-round semimonthly area counts of the CIDMMA to examine species presence and population changes overtime. This effort provides information on the importance of the area to numerous bird species and bird species’ grou
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Peitz, David, and Naomi Reibold. Bird community monitoring at Wilson’s Creek National Battlefield, Missouri: Status report 2008–2020. Edited by Tani Hubbard. National Park Service, 2021. http://dx.doi.org/10.36967/nrr-2287875.

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Breeding bird surveys were initiated on Wilson’s Creek National Monument, Missouri, in 2008 to assess temporal changes in the species composition and abundance of birds on the park and to improve our understanding of relationships between breeding birds and their habitat and the effects of management actions, such as invasive plant species control and tree thinning, on bird populations. Birds were sampled using point counts with 38 variable circular plots located on a systematic grid of 400 x 400-m cells (originating from a random start point). All birds seen or heard on a plot during a 5-min
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Peitz, David, and Naomi Reibold. Bird community monitoring at George Washington Carver National Monu-ment, Missouri: Status report 2008–2020. Edited by Tani Hubbard. National Park Service, 2021. http://dx.doi.org/10.36967/nrr-2287852.

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Breeding bird surveys were initiated on George Washington Carver National Monument, Missouri, in 2008 to assess temporal changes in the species composition and abundance of birds on the park and to improve our understanding of relationships between breeding birds and their habitat and the effects of management actions, such as invasive plant species control and tree thinning, on bird populations. Birds were sampled using point counts with 70 variable circular plots located on a systematic grid of 100 x 100-m cells (originating from a random start point). All birds seen or heard on a plot durin
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Boyle, M., and Elizabeth Rico. Terrestrial vegetation monitoring at Cumberland Island National Seashore: 2020 data summary. National Park Service, 2022. http://dx.doi.org/10.36967/2294287.

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The Southeast Coast Network (SECN) conducts long-term terrestrial vegetation monitoring as part of the nationwide Inventory and Monitoring Program of the National Park Service (NPS). The vegetation community vital sign is one of the primary-tier resources identified by SECN park managers, and it is currently conducted at 15 network parks (DeVivo et al. 2008). Monitoring plants and their associated communities over time allows for targeted understanding of ecosystems within the SECN geography, which provides managers information about the degree of change within their parks’ natural vegetation.
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Boyle, Maxwell, and Elizabeth Rico. Terrestrial vegetation monitoring at Timucuan Ecological and Historic Preserve: 2019 data summary—Version 2.0. National Park Service, 2022. http://dx.doi.org/10.36967/nrds-2290196.

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The Southeast Coast Network (SECN) conducts long-term terrestrial vegetation monitoring as part of the nationwide Inventory and Monitoring Program of the National Park Service (NPS). The vegetation community vital sign is one of the primary-tier resources identified by SECN park managers, and it is currently conducted on 15 network parks (DeVivo et al. 2008). Monitoring plants and their associated communities over time allows for targeted understanding of ecosystems within the SECN geography, which provides managers information about the degree of change within their parks’ natural vegetation.
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Sprague, Joshua, David Kushner, James Grunden, Jamie McClain, Benjamin Grime, and Cullen Molitor. Channel Islands National Park Kelp Forest Monitoring Program: Annual report 2014. National Park Service, 2022. http://dx.doi.org/10.36967/2293855.

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Channel Islands National Park (CHIS) has conducted long-term ecological monitoring of the kelp forests around San Miguel, Santa Rosa, Santa Cruz, Anacapa and Santa Barbara Islands since 1982. The original permanent transects were established at 16 sites between 1981 and 1986 with the first sampling beginning in 1982, this being the 33rd year of monitoring. An additional site, Miracle Mile, was established at San Miguel Island in 2001 by a commercial fisherman with assistance from the park. Miracle Mile was partially monitored from 2002 to 2004, and then fully monitored (using all KFM protocols
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DeSaix, Matthew. Bird community monitoring at New River Gorge National River, Gauley River National Recreation Area, and Bluestone National Scenic River, 1997 - 2018. National Park Service, 2022. http://dx.doi.org/10.36967/nrr-2289846.

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Birds are prominent features of National Park Service lands and are effective indicators for monitoring ecosystem health. Assessing the temporal change of avian species abundance depends on long-term monitoring of bird communities and trends, however long-term monitoring programs are generally uncommon. In this report, we summarize 22 years (1997-2018) of point count data across five sites on West Virginia National Park Service lands (three in New River Gorge National River, one in Gauley River National Recreation Area, and one in Bluestone National Scenic River) and compare these results to o
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Bercovier, Herve, and Paul Frelier. Pathogenic Streptococcus in Tilapia: Rapid Diagnosis, Epidemiology and Pathophysiology. United States Department of Agriculture, 1994. http://dx.doi.org/10.32747/1994.7568776.bard.

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Within the project "Pathogenic Streptococcus in Tilapia", gram positive cocci pathogens of fish in Israel and in the United States were characterized. We showed that Streptococcus shiloi, the name for an agent causing septicemic infection in fish, is a junior synonym of Streptococcus iniae and that Enterococcus seriolicida is a junior synonym of Lactococcus garvieae, a causative agent of septicemia and meningo-encephalitis in fish. Molecular epidemiology studies on these two pathogens, based on 16S rDNA sequences and ribotyping showed that although each country had specific clones, S. iniae or
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