MECHANISMS OF MAINTENANCE OF SPECIES DIVERSITY Peter
... extinction rates, and infrequent colonizations (35, 74). The primary concern of this review is with diversity maintenance as species coexistence. Many models of species coexistence are thought of as models of coexistence in some defined local area. However, to make any sense, the area addressed must ...
... extinction rates, and infrequent colonizations (35, 74). The primary concern of this review is with diversity maintenance as species coexistence. Many models of species coexistence are thought of as models of coexistence in some defined local area. However, to make any sense, the area addressed must ...
Biological and ecological traits of marine species
... based on taxonomic and functional traits, can predict invasiveness in communities. We propose that the traits that users need should be prioritised for inclusion in databases. Ideally, this should result in users publishing new analyses resulting from the inclusion of traits in the database, which i ...
... based on taxonomic and functional traits, can predict invasiveness in communities. We propose that the traits that users need should be prioritised for inclusion in databases. Ideally, this should result in users publishing new analyses resulting from the inclusion of traits in the database, which i ...
a full - British Ecological Society
... 4. Thus, theory says that species interactions are a necessary but not sufficient condition for local saturation in ecological time. 5. We then argue that unsaturated (Type I) assemblages are likely to be ubiquitous in nature and that even saturated (Type II) assemblages may not show hard limits to ...
... 4. Thus, theory says that species interactions are a necessary but not sufficient condition for local saturation in ecological time. 5. We then argue that unsaturated (Type I) assemblages are likely to be ubiquitous in nature and that even saturated (Type II) assemblages may not show hard limits to ...
Model Code of Practice for the Humane Control of Feral Cats
... arid zone, and seriously affected bilby, mala and numbat populations. In some instances, feral cats have directly threatened the success of recovery programs for endangered species. Feral cats carry infectious diseases such as toxoplasmosis and sarcosporidiosis, which can be transmitted to native an ...
... arid zone, and seriously affected bilby, mala and numbat populations. In some instances, feral cats have directly threatened the success of recovery programs for endangered species. Feral cats carry infectious diseases such as toxoplasmosis and sarcosporidiosis, which can be transmitted to native an ...
Apparent competition with an invasive plant hastens the extinction of
... Abstract. Invasive plants may compete with native plants by increasing the pressure of native consumers, a mechanism known as ‘‘apparent competition.’’ Apparent competition can be as strong as or stronger than direct competition, but the role of apparent competition has rarely been examined in biolo ...
... Abstract. Invasive plants may compete with native plants by increasing the pressure of native consumers, a mechanism known as ‘‘apparent competition.’’ Apparent competition can be as strong as or stronger than direct competition, but the role of apparent competition has rarely been examined in biolo ...
Colonization in metapopulations: a review of
... The Richter-Dyn/Goel model is quite similar to the MacArthur/Wilson model, but has a logistic density dependence. The predictions from this model are also similar, including the existence of a critical population size, above which extinction is highly improbable. This critical population size is the ...
... The Richter-Dyn/Goel model is quite similar to the MacArthur/Wilson model, but has a logistic density dependence. The predictions from this model are also similar, including the existence of a critical population size, above which extinction is highly improbable. This critical population size is the ...
Species diversity and dominance-richness relationships for ground
... The bait sampling methods have been adapted from PARR ...
... The bait sampling methods have been adapted from PARR ...
Strategies for Managing Early Succession Habitat for Wildlife
... Craig A. Harper* Early succession plant communities consisting of a diverse mixture of grasses, forbs, and scattered shrubs are required by a variety of wildlife species. Early seral stages follow some form of disturbance but can become dominated by shrubs and trees rather quickly, especially in are ...
... Craig A. Harper* Early succession plant communities consisting of a diverse mixture of grasses, forbs, and scattered shrubs are required by a variety of wildlife species. Early seral stages follow some form of disturbance but can become dominated by shrubs and trees rather quickly, especially in are ...
PCA – A Powerful Method for Analyze Ecological Niches
... In many cases, PCA has been used as a source or supporting analysis in the performance of more complex analysis, such as the study of adaptive fish radiation, strongly influenced by trophic niches and water depth (Clabaut et al., 2007), predicting the potential spatial extent of species invasion (Br ...
... In many cases, PCA has been used as a source or supporting analysis in the performance of more complex analysis, such as the study of adaptive fish radiation, strongly influenced by trophic niches and water depth (Clabaut et al., 2007), predicting the potential spatial extent of species invasion (Br ...
Species interactions, local and regional processes, and limits to the
... dragonflies or salamanders, or a several hectare woodland for a guild of foliage-gleaning birds. The scale of the local habitat will generally increase for taxa having larger body sizes and wider home ranges. The distinction between local and regional spatial scales is important because the relative ...
... dragonflies or salamanders, or a several hectare woodland for a guild of foliage-gleaning birds. The scale of the local habitat will generally increase for taxa having larger body sizes and wider home ranges. The distinction between local and regional spatial scales is important because the relative ...
10/4 version of Chapter3
... phenolics, on soils that are low in all nutrients, particularly phosphate. Northup et al. (1998) describe a ...
... phenolics, on soils that are low in all nutrients, particularly phosphate. Northup et al. (1998) describe a ...
Reconciling Ecosystems: Reversing Declines in Native Species
... economy and the environment, where allocations of environmental water or investments in habitat for organisms are viewed as “costs” associated principally with regulatory compliance, without recognizing corresponding benefits. As discussed in Chapter 2 (Box 2.3), these perceptions stem, in part, fro ...
... economy and the environment, where allocations of environmental water or investments in habitat for organisms are viewed as “costs” associated principally with regulatory compliance, without recognizing corresponding benefits. As discussed in Chapter 2 (Box 2.3), these perceptions stem, in part, fro ...
Namadgi National Park, ACT Kosciuszko National Park, NSW
... national parks and reserves are on the National Heritage List for their unique natural environment, longstanding human interaction and scientific significance. The area was damaged severely by bushfires that burnt over 13,000 square kilometres in January 2003. The survey provided researchers with an ...
... national parks and reserves are on the National Heritage List for their unique natural environment, longstanding human interaction and scientific significance. The area was damaged severely by bushfires that burnt over 13,000 square kilometres in January 2003. The survey provided researchers with an ...
CHARACTERIZATION OF ENVIRONMENTAL PARAMETERS AND
... hypothesis was correct in that temperature affects species richness. In this study it was found that species richness was not significantly correlated with pH and salinity. Further analysis with a larger sample sizes is needed to ascertain what, if any, relationship exists between pH, salinity, and ...
... hypothesis was correct in that temperature affects species richness. In this study it was found that species richness was not significantly correlated with pH and salinity. Further analysis with a larger sample sizes is needed to ascertain what, if any, relationship exists between pH, salinity, and ...
Darwin`s Galápagos finches in modern biology
... Another species feeding nearby on a small bush is the sharp-beaked finch (Geospiza difficilis), which has a slightly larger and more cone-shaped beak that is used to collect a more varied diet of both insects and small seeds. On the neighbouring small island of Wolf, members of the same species (G. ...
... Another species feeding nearby on a small bush is the sharp-beaked finch (Geospiza difficilis), which has a slightly larger and more cone-shaped beak that is used to collect a more varied diet of both insects and small seeds. On the neighbouring small island of Wolf, members of the same species (G. ...
GB NON-NATIVE ORGANISM RISK ASSESSMENT SCHEME
... first parturition is 3-8 months. Prenatal embryo losses (up to 50-60%) and abortion of litters could influence productivity. Mean litter size at birth is 4.5-5.4 (Italy, England). In favourable habitats, females may have 2.7 litters/year with a mean of 15 young/year (Gosling 1981). On average, indiv ...
... first parturition is 3-8 months. Prenatal embryo losses (up to 50-60%) and abortion of litters could influence productivity. Mean litter size at birth is 4.5-5.4 (Italy, England). In favourable habitats, females may have 2.7 litters/year with a mean of 15 young/year (Gosling 1981). On average, indiv ...
![whole_diss_fin_draft[2].](http://s1.studyres.com/store/data/003062193_1-403191215a31a029a5378703dc2a9577-300x300.png)
whole_diss_fin_draft[2].
... decline. It has been recognised that this is likely to be due to human induced threats such as habitat loss and degradation, introduced invasive species, environmental pollution, disease, unsustainable use and global climate change (Gibbons, 2000). Thus, it is now recognised that reptiles are one of ...
... decline. It has been recognised that this is likely to be due to human induced threats such as habitat loss and degradation, introduced invasive species, environmental pollution, disease, unsustainable use and global climate change (Gibbons, 2000). Thus, it is now recognised that reptiles are one of ...
Conclusions from the Workshop on
... in other exotic species, (i.e., birds, mammals and other reptiles) for the Southeast Asian domestic pet market. In recent years, there has been a high-profile trade in turtles known or thought to represent new species. Such animals, usually known only from very few individuals, fetch prices of sever ...
... in other exotic species, (i.e., birds, mammals and other reptiles) for the Southeast Asian domestic pet market. In recent years, there has been a high-profile trade in turtles known or thought to represent new species. Such animals, usually known only from very few individuals, fetch prices of sever ...
sILPhIum GaLL wasPs: LIttLe-known PraIrIe
... mented A. minor as also using prairie dock. In 1915 and 1917, Weld documented A. silphii forming terminal stem galls on cup-plant in eastern Nebraska. This was the first published record of any Silphium gall wasp being found outside of Illinois. Weld also presented information indicating that Gille ...
... mented A. minor as also using prairie dock. In 1915 and 1917, Weld documented A. silphii forming terminal stem galls on cup-plant in eastern Nebraska. This was the first published record of any Silphium gall wasp being found outside of Illinois. Weld also presented information indicating that Gille ...
Darwin`s Galápagos finches in modern biology
... Another species feeding nearby on a small bush is the sharp-beaked finch (Geospiza difficilis), which has a slightly larger and more cone-shaped beak that is used to collect a more varied diet of both insects and small seeds. On the neighbouring small island of Wolf, members of the same species (G. ...
... Another species feeding nearby on a small bush is the sharp-beaked finch (Geospiza difficilis), which has a slightly larger and more cone-shaped beak that is used to collect a more varied diet of both insects and small seeds. On the neighbouring small island of Wolf, members of the same species (G. ...
High trophic overlap within the seabird community of Argentinean
... of 14 species of seabirds breeding on the Argentinean Patagonian coast. Tissue samples were collected from nestling and adult seabirds, as well as prey, during three consecutive breeding seasons in 28 breeding colonies. 2. Relative to those in other temperate and polar regions, this seabird communit ...
... of 14 species of seabirds breeding on the Argentinean Patagonian coast. Tissue samples were collected from nestling and adult seabirds, as well as prey, during three consecutive breeding seasons in 28 breeding colonies. 2. Relative to those in other temperate and polar regions, this seabird communit ...
Do climatically similar regions contain similar alien floras?
... was confirmed by experts (using Richardson et al., 2000). Species were classified according to their continent of origin (Africa, America, Asia, Australia and Europe), and for some species Eurasia was considered as a separate unit when the literature did not differentiate between Asia and Europe ori ...
... was confirmed by experts (using Richardson et al., 2000). Species were classified according to their continent of origin (Africa, America, Asia, Australia and Europe), and for some species Eurasia was considered as a separate unit when the literature did not differentiate between Asia and Europe ori ...
1 THEME: BIODIVERSITY 1.1 Introduction
... Through the most powerful human influence, habitat destruction and ill-conceived developments, biodiversity is under threat world-wide. The focus is frequently on the accelerated rate of disappearance of a species in the face of human influence. The fossil record tells us that individual species evo ...
... Through the most powerful human influence, habitat destruction and ill-conceived developments, biodiversity is under threat world-wide. The focus is frequently on the accelerated rate of disappearance of a species in the face of human influence. The fossil record tells us that individual species evo ...
Effects of species diversity on the primary productivity of ecosystems
... ecological research (Loreau et al. 2001, Naeem 2002). Most of our understanding of how species diversity influences productivity has come from experiments performed with assemblages of terrestrial plants (reviewed by Johnson et al. 1996, Waide et al. 1999, Schwartz et al. 2000, Schmid et al. 2001). ...
... ecological research (Loreau et al. 2001, Naeem 2002). Most of our understanding of how species diversity influences productivity has come from experiments performed with assemblages of terrestrial plants (reviewed by Johnson et al. 1996, Waide et al. 1999, Schwartz et al. 2000, Schmid et al. 2001). ...
From individuals to populations to communities A dynamic energy
... Marine ecosystems are submitted to strong anthropogenic pressures, directly through the effects of fisheries, pollutions and ocean acidification and indirectly through the effects of climate changes and their interaction with natural climate variability. Understanding and predicting those effects and ...
... Marine ecosystems are submitted to strong anthropogenic pressures, directly through the effects of fisheries, pollutions and ocean acidification and indirectly through the effects of climate changes and their interaction with natural climate variability. Understanding and predicting those effects and ...
Island restoration
The ecological restoration of islands, or island restoration, is the application of the principles of ecological restoration to islands and island groups. Islands, due to their isolation, are home to many of the world's endemic species, as well as important breeding grounds for seabirds and some marine mammals. Their ecosystems are also very vulnerable to human disturbance and particularly to introduced species, due to their small size. Island groups such as New Zealand and Hawaii have undergone substantial extinctions and losses of habitat. Since the 1950s several organisations and government agencies around the world have worked to restore islands to their original states; New Zealand has used them to hold natural populations of species that would otherwise be unable to survive in the wild. The principal components of island restoration are the removal of introduced species and the reintroduction of native species.