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The University of Chicago
... predation-spider treatments had a significant positive indirect effect on grass biomass and a negative indirect effect on herb biomass (Beckerman et al. 1997). These effects could be attributed largely to the grasshopper diet shift in response to predation risk described above. Consequently, the ind ...
... predation-spider treatments had a significant positive indirect effect on grass biomass and a negative indirect effect on herb biomass (Beckerman et al. 1997). These effects could be attributed largely to the grasshopper diet shift in response to predation risk described above. Consequently, the ind ...
Applying Biodiversity and Ecosystem Function Theory to Turfgrass
... nutrients, water, space, light, etc.). (Fig. 4) (Tilman, 1999, Tilman et al., 1997a). An extension of the niche partitioning theory is species complementarity, which occurs when (i) resources used by multiple species occur in complementary ways in space or time, or (ii) when interspecific interactio ...
... nutrients, water, space, light, etc.). (Fig. 4) (Tilman, 1999, Tilman et al., 1997a). An extension of the niche partitioning theory is species complementarity, which occurs when (i) resources used by multiple species occur in complementary ways in space or time, or (ii) when interspecific interactio ...
keeping options alive - World Resources Report
... "conservation" has a narrower meaningmaintenance or preservation. But "maintenance" or "preservation" seem most useful when confined to practices that keep an ecosystem or population in its existing state. The broader definition used here, in contrast, entails a variety of objectives. A national bio ...
... "conservation" has a narrower meaningmaintenance or preservation. But "maintenance" or "preservation" seem most useful when confined to practices that keep an ecosystem or population in its existing state. The broader definition used here, in contrast, entails a variety of objectives. A national bio ...
PART 1: Isle Royale
... During this lab, you will perform your own experiments to study population dynamics using a computer simulation based on a simplified version of the Isle Royale community. The underlying model includes five species: three plants (grasses, maple trees, and balsam fir trees), moose, and wolves. If you ...
... During this lab, you will perform your own experiments to study population dynamics using a computer simulation based on a simplified version of the Isle Royale community. The underlying model includes five species: three plants (grasses, maple trees, and balsam fir trees), moose, and wolves. If you ...
Know thy enemy: Behavioural response of a native mammal ( coexistence histories
... This study examines the risk assessment response of native rats, Rattus lutreolus velutinus, to the integumental odours of predators of different coexistence history. Spotted-tailed quolls (Dasyurus maculatus) are a native predator of R. l. velutinus (Glen & Dickman 2006; D. Moyle, pers. comm. 2006) ...
... This study examines the risk assessment response of native rats, Rattus lutreolus velutinus, to the integumental odours of predators of different coexistence history. Spotted-tailed quolls (Dasyurus maculatus) are a native predator of R. l. velutinus (Glen & Dickman 2006; D. Moyle, pers. comm. 2006) ...
Download appendices
... Population Reference Site (PopRefSite) The Population Reference Site (PopRefSite) is the primary data table in establishing plant or animal population sites. The PopRefSite identifies the Population Name, whether it is In situ, Ex situ or Reintro, and provides directions to the site, etc. The PopRef ...
... Population Reference Site (PopRefSite) The Population Reference Site (PopRefSite) is the primary data table in establishing plant or animal population sites. The PopRefSite identifies the Population Name, whether it is In situ, Ex situ or Reintro, and provides directions to the site, etc. The PopRef ...
Interactions between phytoplankton, zooplankton and fish in the
... plicatilis, Polyarthra vulgaris). Latter group shows a positive correlation with Zygophyceae and Cyanophyceae. We found a correlation between the densities of phytoplankton and Zooplankton. This may be due to two main factors: nutrient regeneration by Zooplankton, which leads to an increase in Phyto ...
... plicatilis, Polyarthra vulgaris). Latter group shows a positive correlation with Zygophyceae and Cyanophyceae. We found a correlation between the densities of phytoplankton and Zooplankton. This may be due to two main factors: nutrient regeneration by Zooplankton, which leads to an increase in Phyto ...
Challenging The "Distinct Population Segment" Definition Of Atlantic
... print it will not be known whether the Services will change their Rule or what impact Governor King's comments will have on concurrent jurisdiction and federal-state cooperation in protecting Atlantic salmon. This Comment addresses several debated aspects of the proposed listing, proposes an alterna ...
... print it will not be known whether the Services will change their Rule or what impact Governor King's comments will have on concurrent jurisdiction and federal-state cooperation in protecting Atlantic salmon. This Comment addresses several debated aspects of the proposed listing, proposes an alterna ...
4.10 - City of Chowchilla
... avian species. Taller shrubs and trees provide roosting and possibly nesting habitat for various resident species. Such species included acorn woodpeckers (Melanerpes formicivorus), Nuttall's woodpeckers (Picoides nuttallii), western scrub jays (Aphelocoma californica), yellow-billed magpies (Pica n ...
... avian species. Taller shrubs and trees provide roosting and possibly nesting habitat for various resident species. Such species included acorn woodpeckers (Melanerpes formicivorus), Nuttall's woodpeckers (Picoides nuttallii), western scrub jays (Aphelocoma californica), yellow-billed magpies (Pica n ...
Are We Missing the Forest for the Trees?
... One of the major questions in ecology is how plant species coexist and thus how diversity is maintained. While there are many theories to explain the maintenance of plant species diversity, compelling ...
... One of the major questions in ecology is how plant species coexist and thus how diversity is maintained. While there are many theories to explain the maintenance of plant species diversity, compelling ...
Seasonal variations in species composition, abundance, biomass
... distribution, small size, and rapid metabolic and growth rates (Heinbokel, 1978; Verity, 1985; Fenchel, 1987), they are undoubtedly considered to play an important role in transferring the production of picoand nanoplankton to meso- and macrocarnivores (Capriulo and Ninivaggi, 1983; Stoecker and Gov ...
... distribution, small size, and rapid metabolic and growth rates (Heinbokel, 1978; Verity, 1985; Fenchel, 1987), they are undoubtedly considered to play an important role in transferring the production of picoand nanoplankton to meso- and macrocarnivores (Capriulo and Ninivaggi, 1983; Stoecker and Gov ...
Climate Change and Alpine Vegetation Shifts on Mountaintop
... Global temperatures have risen with c.a. 0.85 °C during the past century and are predicted to increase even further at an accelerated rate in the coming decades. These changes in the climate system are having a profound impact on the distribution and composition of plant communities. Mountain ecosys ...
... Global temperatures have risen with c.a. 0.85 °C during the past century and are predicted to increase even further at an accelerated rate in the coming decades. These changes in the climate system are having a profound impact on the distribution and composition of plant communities. Mountain ecosys ...
Ecotones and Ecological Gradients
... Patterns of Biodiversity in Ecotones There have been multiple studies on patterns of biodiversity in ecotonal areas, which have led to a range of results. Recent work is providing increasing evidence that boundary regions between ecological communities can be highly diverse at both the within-specie ...
... Patterns of Biodiversity in Ecotones There have been multiple studies on patterns of biodiversity in ecotonal areas, which have led to a range of results. Recent work is providing increasing evidence that boundary regions between ecological communities can be highly diverse at both the within-specie ...
The Bait Industry as a Potential Vector for Alien Crayfish Introductions
... live bait trade as the most important vector for the introduction of alien crayfishes in North America. In a series of recommendations to reduce alien crayfish introductions, Lodge et al. (2000b) called for all U.S. states to ban the use of live crayfishes as bait. In response to this recommendation ...
... live bait trade as the most important vector for the introduction of alien crayfishes in North America. In a series of recommendations to reduce alien crayfish introductions, Lodge et al. (2000b) called for all U.S. states to ban the use of live crayfishes as bait. In response to this recommendation ...
Community Ecology 8
... Nomenclature: Marhold and Hindák (1998) for plants and Snow and Perrins (1998) for birds. ...
... Nomenclature: Marhold and Hindák (1998) for plants and Snow and Perrins (1998) for birds. ...
Effects of biodiversity on ecosystem stability: distinguishing between
... also because of the consequences for the goods and services provided by natural ecosystems. Consequently, ecologists have focused for decades on testing the idea that systems with more species are more stable. The results, however, have been complex and inconsistent. In particular, it is still uncle ...
... also because of the consequences for the goods and services provided by natural ecosystems. Consequently, ecologists have focused for decades on testing the idea that systems with more species are more stable. The results, however, have been complex and inconsistent. In particular, it is still uncle ...
The influence of dispersal on zooplankton community structure and
... 2001), and random individual and temporal effects (RITEs) (Clark et al. 2007) have been proposed as explanations for the biodiversity paradox. Biological trade-offs involving colonization ability and natural differences between species, including differences in dispersal ability, offer rationales fo ...
... 2001), and random individual and temporal effects (RITEs) (Clark et al. 2007) have been proposed as explanations for the biodiversity paradox. Biological trade-offs involving colonization ability and natural differences between species, including differences in dispersal ability, offer rationales fo ...
Egg predation and parasite prevalence in the invasive freshwater
... snails by M. tuberculata are unknown, egg predation rates on native snails (Physella spp.) by two different size classes (>30 mm and <30 mm, total length) of M. tuberculata were determined in laboratory experiments. Additionally, M. tuberculata were sampled from Diamond Y Spring (Pecos County, TX) t ...
... snails by M. tuberculata are unknown, egg predation rates on native snails (Physella spp.) by two different size classes (>30 mm and <30 mm, total length) of M. tuberculata were determined in laboratory experiments. Additionally, M. tuberculata were sampled from Diamond Y Spring (Pecos County, TX) t ...
Action
... Develop and maintain an accurate inventory of habitat types within the Sutherland Shire * Identify and obtain relevant existing databases, eg. soils, vegetation, asset management studies * Identify data gaps in existing databases. * Complete required studies, and build on existing databases. Informa ...
... Develop and maintain an accurate inventory of habitat types within the Sutherland Shire * Identify and obtain relevant existing databases, eg. soils, vegetation, asset management studies * Identify data gaps in existing databases. * Complete required studies, and build on existing databases. Informa ...
Ecological processes regulating geographic distributions of
... habitats can restrict the distribution of a species. Biotic, interspecific interactions can also restrict where a species can occur. The lack of adaptation to a change in environmental characteristics has long been understood to prohibit colonization of novel habitats. In this case, the genetic vari ...
... habitats can restrict the distribution of a species. Biotic, interspecific interactions can also restrict where a species can occur. The lack of adaptation to a change in environmental characteristics has long been understood to prohibit colonization of novel habitats. In this case, the genetic vari ...
Survey of Seeps and Springs within the Bureau of Land
... Information regarding the location of seeps and springs within the BLM, GJFOMA portion of Mesa County, was gathered to assist in prioritizing which seeps and springs would be visited. Under the assumption that most disturbed or “developed” springs would likely have lower biodiversity, due to sparse ...
... Information regarding the location of seeps and springs within the BLM, GJFOMA portion of Mesa County, was gathered to assist in prioritizing which seeps and springs would be visited. Under the assumption that most disturbed or “developed” springs would likely have lower biodiversity, due to sparse ...
eucalyptus porosa grassy woodlands
... birds, reptiles and invertebrates. Unfortunately, many people still have the misconception that dead trees and fallen branches are only useful as firewood or should at least be tidied up. Leaving dead trees and fallen timber is one of the single most important things that can be done to protect our ...
... birds, reptiles and invertebrates. Unfortunately, many people still have the misconception that dead trees and fallen branches are only useful as firewood or should at least be tidied up. Leaving dead trees and fallen timber is one of the single most important things that can be done to protect our ...
Table of Contents - New England Conference Company
... Comprehensive, reliable habitat classification and mapping is vital for restoration ecology Rehabilitation design to encourage fauna recolonisation Payments for ecosystem services: what difference do they make and who puts their hand up High efficiency woody weed control in Western Sydney The NCC Fi ...
... Comprehensive, reliable habitat classification and mapping is vital for restoration ecology Rehabilitation design to encourage fauna recolonisation Payments for ecosystem services: what difference do they make and who puts their hand up High efficiency woody weed control in Western Sydney The NCC Fi ...
Number 6 - Arthur Haines
... group of orchids in the northeast. The large lower petal (called the labellum) has inrolled margins, creating a saccate structure that gives some species of this group their common name—lady slipper. The North American yellow-flowered lady slippers (Figure 1) have undergone numerous nomenclatural ch ...
... group of orchids in the northeast. The large lower petal (called the labellum) has inrolled margins, creating a saccate structure that gives some species of this group their common name—lady slipper. The North American yellow-flowered lady slippers (Figure 1) have undergone numerous nomenclatural ch ...
population dynamics of two species of kleptoparasitic spiders
... Argyrodes found on the spider webs with calipers. Because it was difficult to know the stage of Argyrodes in the field, I used body length as an indicator for the stage and determined the smallest size of adults, viz., 3 mm for A. flavescens and 2.5 mm for A. bonadea. In this study, web areas of hos ...
... Argyrodes found on the spider webs with calipers. Because it was difficult to know the stage of Argyrodes in the field, I used body length as an indicator for the stage and determined the smallest size of adults, viz., 3 mm for A. flavescens and 2.5 mm for A. bonadea. In this study, web areas of hos ...
Introduced species
![](https://commons.wikimedia.org/wiki/Special:FilePath/Melilotus_alba_bgiu.jpg?width=300)
An introduced, alien, exotic, non-indigenous, or non-native species, or simply an introduction, is a species living outside its native distributional range, which has arrived there by human activity, either deliberate or accidental. Non-native species can have various effects on the local ecosystem. Introduced species that become established and spread beyond the place of introduction are called invasive species. Some have a negative effect on a local ecosystem. Some introduced species may have no negative effect or only minor impact. Some species have been introduced intentionally to combat pests. They are called biocontrols and may be regarded as beneficial as an alternative to pesticides in agriculture for example. In some instances the potential for being beneficial or detrimental in the long run remains unknown. A list of some introduced species is given in a separate article.The effects of introduced species on natural environments have gained much scrutiny from scientists, governments, farmers and others.