1 Introduction
... even if a community remains in equilibrium on a large scale, species presence on a small scale changes ...
... even if a community remains in equilibrium on a large scale, species presence on a small scale changes ...
Wolves–coyotes–foxes: a cascade among carnivores
... Using proportions as predictor variables can sometimes lead to violations of model assumptions such as normality of the residuals and constant variance. In these cases, proportions might need to be logittransformed to map them to the whole real line. As such, we assessed residual and q-q plots using ...
... Using proportions as predictor variables can sometimes lead to violations of model assumptions such as normality of the residuals and constant variance. In these cases, proportions might need to be logittransformed to map them to the whole real line. As such, we assessed residual and q-q plots using ...
Workshop on Predation – Thomas Herbert, Ph.D. I. Basics of the
... migrate to an area where there are others of your species. 5. (Lynx) Recall the data on the relationship between lynx and hare populations as analyzed by MacLulich. What is your relationship to the trappers? (Consider all possibilities.) Predation: The trappers are your predators when they trap you. ...
... migrate to an area where there are others of your species. 5. (Lynx) Recall the data on the relationship between lynx and hare populations as analyzed by MacLulich. What is your relationship to the trappers? (Consider all possibilities.) Predation: The trappers are your predators when they trap you. ...
- Wiley Online Library
... conditions for 24 h (3–6 generations) to diminish the role of phenotypic plasticity, because of environmental or maternal effects, before measuring traits. Measurement of traits At the onset of the selection experiment, four traits of Colpoda were measured: cell size, cell speed, peak population den ...
... conditions for 24 h (3–6 generations) to diminish the role of phenotypic plasticity, because of environmental or maternal effects, before measuring traits. Measurement of traits At the onset of the selection experiment, four traits of Colpoda were measured: cell size, cell speed, peak population den ...
Determinants of Species Richness in the Park Grass Experiment
... essary, or as linear models following a variety of transformations of the counts). The different approaches were compared on the basis of model checks (e.g., constancy of variance and normality of errors) using diagnostic plots (Crawley 2002). It turned out that one of the simplest methods was best, ...
... essary, or as linear models following a variety of transformations of the counts). The different approaches were compared on the basis of model checks (e.g., constancy of variance and normality of errors) using diagnostic plots (Crawley 2002). It turned out that one of the simplest methods was best, ...
Drift fences, coverboards, and other traps
... will vary depending upon the particular project. Among the issues that must be considered are goals of the study and how the data will be analyzed, the cost and availability of materials, anticipated longevity of the project and maintenance effort required, the size and behavior of target species, p ...
... will vary depending upon the particular project. Among the issues that must be considered are goals of the study and how the data will be analyzed, the cost and availability of materials, anticipated longevity of the project and maintenance effort required, the size and behavior of target species, p ...
RIVER CONSERVATION: CHALLENGES AND OPPORTUNITIES
... interest. Many biological traits of nonnative species, such as temperature tolerance or body size, can be important determinants of their invasion success in particular water bodies. However, the best predictors for invasions are usually simply those species that are of interest to humans, and eithe ...
... interest. Many biological traits of nonnative species, such as temperature tolerance or body size, can be important determinants of their invasion success in particular water bodies. However, the best predictors for invasions are usually simply those species that are of interest to humans, and eithe ...
(Repco Rally Australia) In The Norther
... invasion of suitable habitat by weeds, such as Lantana, Crofton Weed and Mistflower in northern NSW. With such a small population occurring in northern NSW/southern Qld, it is essential to prevent any significant impacts occurring from the Repco Rally and any significant disturbances or mortality ...
... invasion of suitable habitat by weeds, such as Lantana, Crofton Weed and Mistflower in northern NSW. With such a small population occurring in northern NSW/southern Qld, it is essential to prevent any significant impacts occurring from the Repco Rally and any significant disturbances or mortality ...
Oh Deer! Do We Have a Problem?
... of the screen. • One-at-a-time, 4 clues about one of the terms will be shown on the screen. You are to determine the term that all the clues refer to. • Record your work in your science notebook or on a google doc. • Some terms may have similar meanings, so be careful not to answer too soon. ...
... of the screen. • One-at-a-time, 4 clues about one of the terms will be shown on the screen. You are to determine the term that all the clues refer to. • Record your work in your science notebook or on a google doc. • Some terms may have similar meanings, so be careful not to answer too soon. ...
Effects of patch attributes, barriers, and distance between patches
... metapopulation model for the Glanville fritillary butterfly (Melitaea cinxia). They found that this complex model did not perform much better than a basic model with only patch size and distance between patches. Likewise, for the forest carabid Abax parallelepipedus distance to the nearest occupied ...
... metapopulation model for the Glanville fritillary butterfly (Melitaea cinxia). They found that this complex model did not perform much better than a basic model with only patch size and distance between patches. Likewise, for the forest carabid Abax parallelepipedus distance to the nearest occupied ...
the role of competition in structuring ant communities: a review
... competition, which predicted that two species can not occupy the same niche or coexist unless there is some divergence in resource use (Schoener 1982). During this period, many entomologists have reported how insects differ in the niches and habitats, and argued that competition is the cause for suc ...
... competition, which predicted that two species can not occupy the same niche or coexist unless there is some divergence in resource use (Schoener 1982). During this period, many entomologists have reported how insects differ in the niches and habitats, and argued that competition is the cause for suc ...
Trends in the extinction of carnivores in Madagascar B. Cartagena
... amphibians and reptiles, fish, birds, lemurs, and other small mammals, and then counted how many categories of food items each species uses (table 1). Habitat breadth for each species was obtained from PANTHERIA (Jones et al., 2009). To quantify the possible ecological overlap between species, we es ...
... amphibians and reptiles, fish, birds, lemurs, and other small mammals, and then counted how many categories of food items each species uses (table 1). Habitat breadth for each species was obtained from PANTHERIA (Jones et al., 2009). To quantify the possible ecological overlap between species, we es ...
Basic and Applied Ecology
... A current goal in ecology is to elucidate the relative roles of primary and secondary consumers versus plant resources in determining community structure and dynamics. The complexity and diversity of terrestrial communities has been hypothesized to strongly influence the strength of these topdown an ...
... A current goal in ecology is to elucidate the relative roles of primary and secondary consumers versus plant resources in determining community structure and dynamics. The complexity and diversity of terrestrial communities has been hypothesized to strongly influence the strength of these topdown an ...
The Ozark/Ouachitas - Partners in Flight
...). Many bird species of Partners
in Flight (PIF) conservation priority have centers of abundance in this region. For
example, relative abundance data from the Breeding Bird Survey (BBS) indicate that
the physiographic area supports over 30% of the ...
...
Ecological indicator role of butterflies in Tam Dao National Park
... ecological state, for example a habitat type, and its fidelity within that state [Dufrêne & Legendre, 1997]. Species with high specificity and high fidelity within a habitat will have a high indicator value. High fidelity (frequency of occurrence) of a species across sample sites is generally associ ...
... ecological state, for example a habitat type, and its fidelity within that state [Dufrêne & Legendre, 1997]. Species with high specificity and high fidelity within a habitat will have a high indicator value. High fidelity (frequency of occurrence) of a species across sample sites is generally associ ...
Cayman`s blue iguanas moves to “endangered” from “critically
... may eventually impact the population, hence this is treated as a continuing decline. Within the three protected areas suitable habitat is quite restricted. The estimated current area of occupancy is 0.5 km²based on the summation of monitored iguana locations. This area may increase slightly in the n ...
... may eventually impact the population, hence this is treated as a continuing decline. Within the three protected areas suitable habitat is quite restricted. The estimated current area of occupancy is 0.5 km²based on the summation of monitored iguana locations. This area may increase slightly in the n ...
frogwatch teachers` guide to frogs as indicators of
... The FrogWatch Teachers’ Guide is dedicated to all educators (indoors and out), naturalists, and members of the scientific community who are helping others to connect with the natural world, and showing youth that they can make a difference in the future of the environment. This education guide could ...
... The FrogWatch Teachers’ Guide is dedicated to all educators (indoors and out), naturalists, and members of the scientific community who are helping others to connect with the natural world, and showing youth that they can make a difference in the future of the environment. This education guide could ...
Genetics in conservation management: Revised recommendations
... heritabilities (genetic variation as a proportion of phenotypic variation) are lower for fitness than for quantitative traits peripherally related to fitness (Mousseau and Roff, 1987; Falconer and Mackay, 1996), (iv) non-additive genetic variation is greater for fitness than peripheral traits (Frankham ...
... heritabilities (genetic variation as a proportion of phenotypic variation) are lower for fitness than for quantitative traits peripherally related to fitness (Mousseau and Roff, 1987; Falconer and Mackay, 1996), (iv) non-additive genetic variation is greater for fitness than peripheral traits (Frankham ...
... as state species of concern and subject to a rangewide conservation agreement aimed at ensuring their persistence throughout their range (UDWR 2006). Many of the non-native fishes present in the basin have the potential to negatively impact populations of these native fishes through competition or p ...
Overview of a passive tracking index for monitoring wild canids and
... were conducted on two large ranches in 1998 (Engeman et al. 2000) and a third trial was conducted at another ranch site in 1999 (Engeman unpublished data). We applied the index before and after trapping to determine how sensitive index values were to the known reductions in coyote populations. The P ...
... were conducted on two large ranches in 1998 (Engeman et al. 2000) and a third trial was conducted at another ranch site in 1999 (Engeman unpublished data). We applied the index before and after trapping to determine how sensitive index values were to the known reductions in coyote populations. The P ...
Great Basin naturalist memoirs
... predation and competition, have been advanced as the ultimate cause of the patterns. We outline the wav in which each of these factors could produce observed community-level patterns and review the evidence for the action of each factor. We conclude that the "competition" hypothesis has more support ...
... predation and competition, have been advanced as the ultimate cause of the patterns. We outline the wav in which each of these factors could produce observed community-level patterns and review the evidence for the action of each factor. We conclude that the "competition" hypothesis has more support ...
Historical and ecological dimensions of global patterns
... the same diversity, the discrepancy is reconciled by differences in habitat specialization. Where local diversity within habitats is conserved, higher regional diversity must be accompanied by increased habitat specialization. This principle was elaborated by Martin Cody (1975) who used Whittaker’s ...
... the same diversity, the discrepancy is reconciled by differences in habitat specialization. Where local diversity within habitats is conserved, higher regional diversity must be accompanied by increased habitat specialization. This principle was elaborated by Martin Cody (1975) who used Whittaker’s ...
Review of science-based assessments of species vulnerability
... Overall species vulnerability is based on a score against 21 criteria divided into two categories: (1) response to climate change and (2) species-specific sensitivity. First, species response to climate change is assessed by using a numerical score that represents a documented change in (1) distribu ...
... Overall species vulnerability is based on a score against 21 criteria divided into two categories: (1) response to climate change and (2) species-specific sensitivity. First, species response to climate change is assessed by using a numerical score that represents a documented change in (1) distribu ...