Savanna herbivore dynamics in a livestock
... remained negligible, and livestock densities have not increased for decades (Georgiadis et al., 2007). Of additional interest was why other wild species did not decline on prowildlife properties (plains zebra, Grant’s gazelle Gazella grantii, impala Aepyceros melampus, and giraffe). Seeking to under ...
... remained negligible, and livestock densities have not increased for decades (Georgiadis et al., 2007). Of additional interest was why other wild species did not decline on prowildlife properties (plains zebra, Grant’s gazelle Gazella grantii, impala Aepyceros melampus, and giraffe). Seeking to under ...
Towards a food web perspective on biodiversity and ecosystem
... that paper were useful, in part, because they represented an alternative to those posed by a number of other authors. For example, some have argued that extinction at higher trophic levels may, in fact, have less impact on ecological processes than extinction at lower trophic levels. These arguments ...
... that paper were useful, in part, because they represented an alternative to those posed by a number of other authors. For example, some have argued that extinction at higher trophic levels may, in fact, have less impact on ecological processes than extinction at lower trophic levels. These arguments ...
abstracts - Cascadia Prairie Oak Partnership
... Successful restoration, reintroduction and plant conservation relies on many interconnected variables. One such example is genetic variability of ecologically appropriate plant material. In the short term, higher diversity can improve plant establishment, affect community structure and productivity. ...
... Successful restoration, reintroduction and plant conservation relies on many interconnected variables. One such example is genetic variability of ecologically appropriate plant material. In the short term, higher diversity can improve plant establishment, affect community structure and productivity. ...
The Population Biology of Invasive Species Ann K. Sakai
... initial colonization and successful establishment of a species; and (3) subsequent dispersal and secondary spread into new habitats. During all stages, there is great potential for genetic changes to occur through drift or selection. In the following sections, we discuss factors related to these sta ...
... initial colonization and successful establishment of a species; and (3) subsequent dispersal and secondary spread into new habitats. During all stages, there is great potential for genetic changes to occur through drift or selection. In the following sections, we discuss factors related to these sta ...
2016 Joint ICTWS, WCTWS, SNVB, and NW PARC Meeting Abstracts
... Department of Fish and Wildlife Sciences, Moscow, ID 83844; Jennifer L Stenglein, Wisconsin Department of Natural Resources, Madison, WI 53705; Lisette P Waits, University of Idaho, Department of Fish and Wildlife Sciences, Moscow, ID 83844; [email protected] Recruitment in wolves can be negatively ...
... Department of Fish and Wildlife Sciences, Moscow, ID 83844; Jennifer L Stenglein, Wisconsin Department of Natural Resources, Madison, WI 53705; Lisette P Waits, University of Idaho, Department of Fish and Wildlife Sciences, Moscow, ID 83844; [email protected] Recruitment in wolves can be negatively ...
concepts-of-biology
... Another tool used by population ecologists is a survivorship curve, which is a graph of the number of individuals surviving at each age interval versus time. These curves allow us to compare the life histories of different populations (Figure 19.4). There are three types of survivorship curves. In a ...
... Another tool used by population ecologists is a survivorship curve, which is a graph of the number of individuals surviving at each age interval versus time. These curves allow us to compare the life histories of different populations (Figure 19.4). There are three types of survivorship curves. In a ...
L E T T E R
... In our analysis of population stability, abundances for each plot were detrended by regressing abundances against year before calculating standard deviation of detrended abundances. Detrending removed variation caused by long-term directional change in arthropod abundances that could be attributed t ...
... In our analysis of population stability, abundances for each plot were detrended by regressing abundances against year before calculating standard deviation of detrended abundances. Detrending removed variation caused by long-term directional change in arthropod abundances that could be attributed t ...
Response of macroarthropod assemblages to the loss
... instantaneous removal of boles and large limbs leaving only small branches, twigs, and leaves atop soil compacted by heavy machinery— should have profound consequences for species dependent on hemlock’s different life stages and the environment that it creates. In this study, we quantified changes i ...
... instantaneous removal of boles and large limbs leaving only small branches, twigs, and leaves atop soil compacted by heavy machinery— should have profound consequences for species dependent on hemlock’s different life stages and the environment that it creates. In this study, we quantified changes i ...
CHANGES IN PATTERNS OF TERRITORY AND HABITAT OVERLAP IN WOOD- by
... are thought to require longer periods of time to evolve (Richman and Price 1992). Therefore we may expect coexisting species to initially occupy distinct habitats to avoid fitness costs of spatial overlap, and gradually diverge over evolutionary time with respect to other ecological traits such as ...
... are thought to require longer periods of time to evolve (Richman and Price 1992). Therefore we may expect coexisting species to initially occupy distinct habitats to avoid fitness costs of spatial overlap, and gradually diverge over evolutionary time with respect to other ecological traits such as ...
Using AMOEBAs to display multispecies
... cod, haddock, whiting, and saithe, that are piscivorous to some extent, or target flatfish species such as sole and plaice, often with a bycatch of roundfish species. Pelagic fisheries for human consumption are directed at species such as herring and mackerel, while the industrial fishery targets forage ...
... cod, haddock, whiting, and saithe, that are piscivorous to some extent, or target flatfish species such as sole and plaice, often with a bycatch of roundfish species. Pelagic fisheries for human consumption are directed at species such as herring and mackerel, while the industrial fishery targets forage ...
Avian Abundance and Diversity in CREP and Fescue Fields in the
... to grassland bird populations; in this study we are examining how the Kentucky CREP program is influencing bird populations, particularly grassland birds, and contributing to the conservation of these species. Bird and vegetation surveys were conducted during the summer of 2008 and the winter of 201 ...
... to grassland bird populations; in this study we are examining how the Kentucky CREP program is influencing bird populations, particularly grassland birds, and contributing to the conservation of these species. Bird and vegetation surveys were conducted during the summer of 2008 and the winter of 201 ...
The interplay between environmental conditions and Allee effects
... large and small, but fluctuations in population density are expected to scale inversely with the square root of population numbers, making smaller populations more susceptible (May 1973, Griffen and Drake 2008). As a result of the combined influence of Allee effects and demographic stochasticity, th ...
... large and small, but fluctuations in population density are expected to scale inversely with the square root of population numbers, making smaller populations more susceptible (May 1973, Griffen and Drake 2008). As a result of the combined influence of Allee effects and demographic stochasticity, th ...
Functional traits of woody plants: correspondence of species
... Some preliminary studies tackled this question for a small number of leaf traits, but with a bias towards herbaceous species (Garnier & Freijsen 1994; Fenner et al. 1999; Poorter & de Jong 1999; Poorter & Garnier 1999). For woody plants, some data are available for specific leaf area (SLA, leaf area ...
... Some preliminary studies tackled this question for a small number of leaf traits, but with a bias towards herbaceous species (Garnier & Freijsen 1994; Fenner et al. 1999; Poorter & de Jong 1999; Poorter & Garnier 1999). For woody plants, some data are available for specific leaf area (SLA, leaf area ...
Section 5 WILDLIFE AND SIGNIFICANT WILDLIFE
... and system occurrences. Natural communities are different types of forests, wetlands, grasslands, etc. Natural community systems occur where sets of natural communities cooccur in the landscape and are linked by a common set of driving forces, such as landforms, flooding, or soils. To qualify as exe ...
... and system occurrences. Natural communities are different types of forests, wetlands, grasslands, etc. Natural community systems occur where sets of natural communities cooccur in the landscape and are linked by a common set of driving forces, such as landforms, flooding, or soils. To qualify as exe ...
2006_1_ivaskik207KBJun 26 2006 10:25:31 AM
... operations, fertilizing and application of chemical pesticides have dramatical effect on invertebrate animals. Any management practices applied to soils are likely to have some (positive or negative) effects on earthworm abundance and diversity, these effects are primarily the result of changes in s ...
... operations, fertilizing and application of chemical pesticides have dramatical effect on invertebrate animals. Any management practices applied to soils are likely to have some (positive or negative) effects on earthworm abundance and diversity, these effects are primarily the result of changes in s ...
Disruption of ant-seed dispersal mutualisms by the invasive Asian
... Effect of P. chinensis on seed dispersal We assessed the impact of P. chinensis on seed dispersal rates of bloodroot (A. canadense), a common myrmecochorous species in Yates Mill County Park. The species is a widespread, shade-tolerant perennial that occurs in forest understories throughout the east ...
... Effect of P. chinensis on seed dispersal We assessed the impact of P. chinensis on seed dispersal rates of bloodroot (A. canadense), a common myrmecochorous species in Yates Mill County Park. The species is a widespread, shade-tolerant perennial that occurs in forest understories throughout the east ...
Placing biodiversity and ecosystem functioning in context
... Such research falls into two broad but distinct fields: functional bioassessment, which addresses the impacts of environmental degradation on important ecosystem processes (e.g. Doroszuk et al. 2007; McKie and Malmqvist 2009); and biodiversity–ecosystem functioning research, which focuses on the inf ...
... Such research falls into two broad but distinct fields: functional bioassessment, which addresses the impacts of environmental degradation on important ecosystem processes (e.g. Doroszuk et al. 2007; McKie and Malmqvist 2009); and biodiversity–ecosystem functioning research, which focuses on the inf ...
EVPP 550 Waterscape Ecology and Management – Lecture 10
... • Here is a second one with two synchronized populations and a resting stage • This is most common in copepods which require sexual reproduction • In the cladocerans and rotifers, there is less synchrony generally partially due to continuous asexual reproduction under favorable conditions • It’s als ...
... • Here is a second one with two synchronized populations and a resting stage • This is most common in copepods which require sexual reproduction • In the cladocerans and rotifers, there is less synchrony generally partially due to continuous asexual reproduction under favorable conditions • It’s als ...
Modeling Food-Web Dynamics: Complexity
... (2) the consumers are subject to strong self-dampening (up to 20 times the maximum growth rate of primary producers) which restricts their population growth, and (3) a bias towards bottom-up control of the interactions (i.e., resource biomass has a stronger influence on the interaction strength valu ...
... (2) the consumers are subject to strong self-dampening (up to 20 times the maximum growth rate of primary producers) which restricts their population growth, and (3) a bias towards bottom-up control of the interactions (i.e., resource biomass has a stronger influence on the interaction strength valu ...
Climate-related range shifts – a global multidimensional synthesis
... In addition to these three geographic dimensions, species range shifts are usually described through changes occurring in specific distribution parameters, such as range margins, range core or abundance (Lenoir and Svenning 2013). The earliest detection of species range shifts under 20th century clim ...
... In addition to these three geographic dimensions, species range shifts are usually described through changes occurring in specific distribution parameters, such as range margins, range core or abundance (Lenoir and Svenning 2013). The earliest detection of species range shifts under 20th century clim ...
Explaining density-dependent regulation in earthworm populations
... Density values of L. terrestris in the field have shown to be very variable among different habitats with densities being relatively higher in grass meadows than forest soils. In a study on the field population dynamics of L. terrestris, Daniel (1992) found densities ranging from 0.2 to a maximum of ...
... Density values of L. terrestris in the field have shown to be very variable among different habitats with densities being relatively higher in grass meadows than forest soils. In a study on the field population dynamics of L. terrestris, Daniel (1992) found densities ranging from 0.2 to a maximum of ...
Environmental variability and population dynamics: do European
... term environmental variation, as described above for North American ...
... term environmental variation, as described above for North American ...
- Wiley Online Library
... and dynamics over time. To acquire better information, we should target invasions of known ages, including new invasions, and gather data as the invasion progresses or, alternatively, substitute space for time by evaluating pathogen richness and abundance at sites along a chronosequence of invasion ...
... and dynamics over time. To acquire better information, we should target invasions of known ages, including new invasions, and gather data as the invasion progresses or, alternatively, substitute space for time by evaluating pathogen richness and abundance at sites along a chronosequence of invasion ...
Life 9e - Garvness
... worms we see now were introduced from Europe. d. Both a and b e. Both b and c Answer: e Textbook Reference: 59.3 What Factors Threaten Species Persistence? Page: 1250 Bloom’s Category: 1. Remembering 32. The processes of climate change are likely to lead to entirely new climates a. in the highlands ...
... worms we see now were introduced from Europe. d. Both a and b e. Both b and c Answer: e Textbook Reference: 59.3 What Factors Threaten Species Persistence? Page: 1250 Bloom’s Category: 1. Remembering 32. The processes of climate change are likely to lead to entirely new climates a. in the highlands ...
DEFORESTATION PATTERNS AND HUMMINGBIRD DIvERSITy IN
... Several studies have identified niche breadth i.e. the range of resources utilized by a species as a determining factor in terms of ecological resilience (Swihart et al., 2006), and thus also decide a species geographical range (Slatyer et al., 2013). Geographically separated populations of the sam ...
... Several studies have identified niche breadth i.e. the range of resources utilized by a species as a determining factor in terms of ecological resilience (Swihart et al., 2006), and thus also decide a species geographical range (Slatyer et al., 2013). Geographically separated populations of the sam ...