Proposal for Crayfish Surveys of Big Thicket National Preserve
... Fallicambarus wallsi has a much more limited distribution, and possibly occurs in northern BTNP units; both species along with F. devastator are Trinity/Neches River endemics. At present, four described species likely occur in BTNP. That being said, it is likely F. fodiens populations in BTNP actual ...
... Fallicambarus wallsi has a much more limited distribution, and possibly occurs in northern BTNP units; both species along with F. devastator are Trinity/Neches River endemics. At present, four described species likely occur in BTNP. That being said, it is likely F. fodiens populations in BTNP actual ...
Stochastic competitive exclusion leads to a cascade of
... coexistence in aspects other than the maximum similarity of co-occurring species. Beyond a more restrictive threshold in competition induced by ecological drift (which was the main result of Capitán et al. (2015)), we here analyze the influence of demographic stochasticity on the extinction mechani ...
... coexistence in aspects other than the maximum similarity of co-occurring species. Beyond a more restrictive threshold in competition induced by ecological drift (which was the main result of Capitán et al. (2015)), we here analyze the influence of demographic stochasticity on the extinction mechani ...
Similarities in perceived predation risk prevent temporal partitioning
... between the microhabitats, even if the competitors do not. As different predators are active at different times, safe areas across the landscape may vary temporally (Jacob and Brown 2000; Jones et al. 2001). For example, aerial predators (e.g., falcons and hawks) tend to be more active during the da ...
... between the microhabitats, even if the competitors do not. As different predators are active at different times, safe areas across the landscape may vary temporally (Jacob and Brown 2000; Jones et al. 2001). For example, aerial predators (e.g., falcons and hawks) tend to be more active during the da ...
Big APES Exam review questions for each unit
... 3. Describe how the following field procedures are set up, in what experimental situations they would be most useful, and the type of data that they measure: line transect; field quadrant; random sampling; capture, mark, recapture; specimen collection; chemical analysis; biological analysis; stream ...
... 3. Describe how the following field procedures are set up, in what experimental situations they would be most useful, and the type of data that they measure: line transect; field quadrant; random sampling; capture, mark, recapture; specimen collection; chemical analysis; biological analysis; stream ...
Extreme diversity of tropical parasitoid wasps exposed by iterative
... forest, and rain forest in Area de Conservación Guanacaste (ACG) in northwestern Costa Rica and combined these data with records of caterpillar hosts and morphological analyses. We asked whether barcoding and morphology discover the same provisional species and whether the biological entities revea ...
... forest, and rain forest in Area de Conservación Guanacaste (ACG) in northwestern Costa Rica and combined these data with records of caterpillar hosts and morphological analyses. We asked whether barcoding and morphology discover the same provisional species and whether the biological entities revea ...
JVS 2391 Cavieres
... glacialis are effective nurse plants, and that the ameliorative environmental effect of these species could be explained by cushions being more efficient in producing and retaining organic matter as well as conserving nutrients and soil moisture. Moreover, these authors reported an absence of replac ...
... glacialis are effective nurse plants, and that the ameliorative environmental effect of these species could be explained by cushions being more efficient in producing and retaining organic matter as well as conserving nutrients and soil moisture. Moreover, these authors reported an absence of replac ...
Full text in pdf format
... older than 35 yr were absent, suggesting complete removal of this segment of the population. The largest relative decrease in abundance was for 20 to 25-yr-old colonies. The declines in year-classes between 197 l and 1983 for Classes 15 to 55 are slightly conservative because they 'contain' 3 yr of ...
... older than 35 yr were absent, suggesting complete removal of this segment of the population. The largest relative decrease in abundance was for 20 to 25-yr-old colonies. The declines in year-classes between 197 l and 1983 for Classes 15 to 55 are slightly conservative because they 'contain' 3 yr of ...
The Altitudinal Niche-Breadth Hypothesis in Insect
... One should keep in mind that the observed level of specialization of a given species might obviously rely on the available partners. For instance, due to dispersal limitations, insect species arising from radiation events are constrained to feed on the host plants available to them locally, forming ...
... One should keep in mind that the observed level of specialization of a given species might obviously rely on the available partners. For instance, due to dispersal limitations, insect species arising from radiation events are constrained to feed on the host plants available to them locally, forming ...
Effect of Parity on Productivity and Sustainability of
... of productivity is found in a food chain with an odd number of species. This manuscript details how models of food chains corroborate these hypotheses. To understand the effects of parity on the bottom up vs. top down regulation of productivity in food chains, we model food chains using Lotka-Volter ...
... of productivity is found in a food chain with an odd number of species. This manuscript details how models of food chains corroborate these hypotheses. To understand the effects of parity on the bottom up vs. top down regulation of productivity in food chains, we model food chains using Lotka-Volter ...
Here are some excerpts from various reports and articles of
... 210/ The need for large volumes of water for respiration results in the production of large quantities of pseudofaeces which represent an easily degradable material deposited ont he sediment surface. This explains the extreme reactivity of this sediment horizon in the farmed area and the rapid rege ...
... 210/ The need for large volumes of water for respiration results in the production of large quantities of pseudofaeces which represent an easily degradable material deposited ont he sediment surface. This explains the extreme reactivity of this sediment horizon in the farmed area and the rapid rege ...
Assessing the health of European rivers using
... IBIs has focussed on the combination of metrics relating to the species composition, biological diversity, species abundance and condition (e.g. prevalence of disease, hybrids and deformities) of fish communities. In most cases, the composition, diversity and abundance measures assess the functional ...
... IBIs has focussed on the combination of metrics relating to the species composition, biological diversity, species abundance and condition (e.g. prevalence of disease, hybrids and deformities) of fish communities. In most cases, the composition, diversity and abundance measures assess the functional ...
Examining the Extinction of the Pleistocene Megafauna
... existing species. Larger animals generally require a larger primary habitat, more forage, and more water to maintain themselves than a smaller species. Therefore, there are usually only a few of them in a given area. As Grayson says, “the inverse relationship between body size and population size pl ...
... existing species. Larger animals generally require a larger primary habitat, more forage, and more water to maintain themselves than a smaller species. Therefore, there are usually only a few of them in a given area. As Grayson says, “the inverse relationship between body size and population size pl ...
Commonwealth Funding to Help Protect Northern Quolls
... cane toads cause substantial declines in northern quoll (Dasyurus hallucatus) populations. There is a significant risk that quoll species across northern Australia may become locally extinct in areas invaded by cane toads. As a precautionary measure, a representative sample of northern quolls have b ...
... cane toads cause substantial declines in northern quoll (Dasyurus hallucatus) populations. There is a significant risk that quoll species across northern Australia may become locally extinct in areas invaded by cane toads. As a precautionary measure, a representative sample of northern quolls have b ...
Predictors of species sensitivity to fragmentation
... et al. 2004 (this issue)). Furthermore, since large populations will have to pass through small size before extinction, this prediction should be very general, with species that exhibit chaotic dynamics being an exception (May and Oster 1976; Gabriel and Bürger 1992). Attempts to detect density depe ...
... et al. 2004 (this issue)). Furthermore, since large populations will have to pass through small size before extinction, this prediction should be very general, with species that exhibit chaotic dynamics being an exception (May and Oster 1976; Gabriel and Bürger 1992). Attempts to detect density depe ...
Abiotic vs. Biotic Influences on Habitat Selection of Coexisting
... Abstract. Species are commonly segregated along gradients of microclimate and vegetation. I explore the question of whether segregation is the result of microhabitat partitioning (biotic effects) or choice of differing microclimates (abiotic effects). I explored this question for four ground-nesting ...
... Abstract. Species are commonly segregated along gradients of microclimate and vegetation. I explore the question of whether segregation is the result of microhabitat partitioning (biotic effects) or choice of differing microclimates (abiotic effects). I explored this question for four ground-nesting ...
Terrestrial Arthropod Assemblages: Their Use in Conservation
... 1988). In this discussion, we frequentlycompare terrestrial arthropods and vertebrates-not to insist that terrestrial arthropods universally serve as "better" indicators, but to illustrate circumstances in which their use might be particularly advantageous. Terrestrial arthropods make up 93% of the ...
... 1988). In this discussion, we frequentlycompare terrestrial arthropods and vertebrates-not to insist that terrestrial arthropods universally serve as "better" indicators, but to illustrate circumstances in which their use might be particularly advantageous. Terrestrial arthropods make up 93% of the ...
abiotic vs. biotic influences on habitat selection
... Abstract. Species are commonly segregated along gradients of microclimate and vegetation. I explore the question of whether segregation is the result of microhabitat partitioning (biotic effects) or choice of differing microclimates (abiotic effects). I explored this question for four ground-nesting ...
... Abstract. Species are commonly segregated along gradients of microclimate and vegetation. I explore the question of whether segregation is the result of microhabitat partitioning (biotic effects) or choice of differing microclimates (abiotic effects). I explored this question for four ground-nesting ...
Habitat heterogeneity affects population growth in goshawk Accipiter
... Free Distribution-type of habitat settlement and density dependence in a vital rate mediated by habitat heterogeneity. The latter is also known as habitat heterogeneity hypothesis. Site-dependent population regulation hypothesis predicts that increasing population density should lead to inhabitation ...
... Free Distribution-type of habitat settlement and density dependence in a vital rate mediated by habitat heterogeneity. The latter is also known as habitat heterogeneity hypothesis. Site-dependent population regulation hypothesis predicts that increasing population density should lead to inhabitation ...
Case studies in the conservation of biodiversity: degradation and
... ground-truthing, less comprehensive monitoring coverage, and difficulty in identifying taxa. Habitat degradation is the process by which habitat quality for a given species is diminished. Conceivably, habitat quality is a less extreme environmental change than complete loss of habitat. Ideally, habi ...
... ground-truthing, less comprehensive monitoring coverage, and difficulty in identifying taxa. Habitat degradation is the process by which habitat quality for a given species is diminished. Conceivably, habitat quality is a less extreme environmental change than complete loss of habitat. Ideally, habi ...
Evolution, Biodiversity, and Population Ecology
... specific requirements - Extremely good at what they do, but vulnerable to change • Generalists = species with broad niches that can use a wide array of habitats and resources - Able to live in many different places Copyright © 2008 Pearson Education, Inc., publishing as Benjamin Cummings ...
... specific requirements - Extremely good at what they do, but vulnerable to change • Generalists = species with broad niches that can use a wide array of habitats and resources - Able to live in many different places Copyright © 2008 Pearson Education, Inc., publishing as Benjamin Cummings ...
Chapter 2. Examples of Variation Patterns within Species and Genera
... another and depends on various factors, both external and internal, which promote continuity or partial discontinuity in the variation pattern. From the foregoing discussion, the fact should be clear that clines and ecotypes are not mutually exclusive concepts, but merely express different ways of a ...
... another and depends on various factors, both external and internal, which promote continuity or partial discontinuity in the variation pattern. From the foregoing discussion, the fact should be clear that clines and ecotypes are not mutually exclusive concepts, but merely express different ways of a ...
When can two plant species facilitate each other`s pollination?
... Feldman, T. S., Morris, W. F. and Wilson, W. G. 2004. When can two plant species facilitate each other’s pollination? / Oikos 105: 197 /207. Facilitation occurs when an increase in the density of one species causes an increase in the population growth rate or the density of a second species. In pl ...
... Feldman, T. S., Morris, W. F. and Wilson, W. G. 2004. When can two plant species facilitate each other’s pollination? / Oikos 105: 197 /207. Facilitation occurs when an increase in the density of one species causes an increase in the population growth rate or the density of a second species. In pl ...
Reintroduction: challenges and lessons for basic ecology
... according to the methods involved. It appeared, however, that even the success criterion was not clearly defined among authors. For example, Craig and Reed (in Ref. 15) think that a three-year breeding population with a recruitment rate that is higher than the death rate of adults describes successf ...
... according to the methods involved. It appeared, however, that even the success criterion was not clearly defined among authors. For example, Craig and Reed (in Ref. 15) think that a three-year breeding population with a recruitment rate that is higher than the death rate of adults describes successf ...
Consumer species richness and nutrients
... prey diversity have been largely neglected. It is well known that a loss of a consumer species can radically change entire ecosystems18, but we can only guess what the consequences of losing multiple consumer species would be. Furthermore, it is acknowledged that the mechanisms that regulate biodive ...
... prey diversity have been largely neglected. It is well known that a loss of a consumer species can radically change entire ecosystems18, but we can only guess what the consequences of losing multiple consumer species would be. Furthermore, it is acknowledged that the mechanisms that regulate biodive ...
Intraspecific priority effects and disease interact to alter population
... spores. Higher values of b indicate lower host resistance (i.e., higher susceptibility). We used the binomial distribution to find an estimate of b that best fit the infection data (using maximum likelihood). We tested for significant differences between populations using bootstrapped confidence estimat ...
... spores. Higher values of b indicate lower host resistance (i.e., higher susceptibility). We used the binomial distribution to find an estimate of b that best fit the infection data (using maximum likelihood). We tested for significant differences between populations using bootstrapped confidence estimat ...