Maccullochella macquariensis - Environment, Planning and
... floodplain habitat is likely to have been a contributing factor in the decline of the species in lowland rivers such as the Murray, Macquarie and lower Murrumbidgee rivers where woody debris in backwaters and flood channels may have been a favoured spawning and larval development habitat. However, i ...
... floodplain habitat is likely to have been a contributing factor in the decline of the species in lowland rivers such as the Murray, Macquarie and lower Murrumbidgee rivers where woody debris in backwaters and flood channels may have been a favoured spawning and larval development habitat. However, i ...
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... SYNOPSIS. Freshwater and marine snails serve as intermediate hosts for numerous species of larval trematodes. Any particular population of snails may be infected by several species. It is commonly observed that mixedspecies infections are less frequent than expected by change in collections of host ...
... SYNOPSIS. Freshwater and marine snails serve as intermediate hosts for numerous species of larval trematodes. Any particular population of snails may be infected by several species. It is commonly observed that mixedspecies infections are less frequent than expected by change in collections of host ...
Chesson, P., Pacala, S., Neuhauser, C. 2001. Environmental niches
... environment. If the environment is not favorable for species j, i.e. Ej(t) is small, then the effect of C(t) is small. Indeed, in the extreme case where Ej(t) = 0, C(t) has no effect on rj(t), which then is fixed at the negative value -*. Similarly, if competition is strong, e.g. near its maximum va ...
... environment. If the environment is not favorable for species j, i.e. Ej(t) is small, then the effect of C(t) is small. Indeed, in the extreme case where Ej(t) = 0, C(t) has no effect on rj(t), which then is fixed at the negative value -*. Similarly, if competition is strong, e.g. near its maximum va ...
Enemy free space and the structure of ecological
... Our aim is to show how many numerous aspects of the ecology of animal species that are traditionally reviewed as components of their niche, (body size, feeding stations, feeding methods, etc.), have been influenced, not by competitors, but by natural enemies. Although all ecologists recognize that t ...
... Our aim is to show how many numerous aspects of the ecology of animal species that are traditionally reviewed as components of their niche, (body size, feeding stations, feeding methods, etc.), have been influenced, not by competitors, but by natural enemies. Although all ecologists recognize that t ...
Mammals on mountainsides: elevational patterns of diversity
... terrestrial mammals, reported by Heaney in the Philippines, would not appear to hold for the other regions. Another difference already mentioned is the continuously increasing species diversity of bats with increasing elevation in Oaxaca, compared to the hump-shaped relationship for non-volant mamma ...
... terrestrial mammals, reported by Heaney in the Philippines, would not appear to hold for the other regions. Another difference already mentioned is the continuously increasing species diversity of bats with increasing elevation in Oaxaca, compared to the hump-shaped relationship for non-volant mamma ...
A network approach for inferring species associations from co
... the partial correlations, e.g. between each gene pair after taking into account the remaining genes (Dobra et al. 2004, Friedman et al. 2008). The approach ensures estimation of conditional instead of joint associations and has recently been extended to ecological association networks (Harris 2015 ...
... the partial correlations, e.g. between each gene pair after taking into account the remaining genes (Dobra et al. 2004, Friedman et al. 2008). The approach ensures estimation of conditional instead of joint associations and has recently been extended to ecological association networks (Harris 2015 ...
Wildlife corridors - natural resource management information note
... approach is required across both public and private lands to protect and manage natural ecosystems and ensure connectivity between remaining habitats. When native vegetation is cleared, fragmented patches or islands are created. These patches may become increasingly cut-off from other areas of habit ...
... approach is required across both public and private lands to protect and manage natural ecosystems and ensure connectivity between remaining habitats. When native vegetation is cleared, fragmented patches or islands are created. These patches may become increasingly cut-off from other areas of habit ...
Global patterns and predictors of marine biodiversity across
... normalized richness) occurred in areas with medium or higher human impact more frequently than expected by chance alone (Fig. 3d; null permutation model P , 0.05). Such overlapping hotspots of species richness and human impact should be further assessed across finer grain sizes, and may be an import ...
... normalized richness) occurred in areas with medium or higher human impact more frequently than expected by chance alone (Fig. 3d; null permutation model P , 0.05). Such overlapping hotspots of species richness and human impact should be further assessed across finer grain sizes, and may be an import ...
How Wild is Vild Campus - Det Natur
... Halictidae are eusocial, meaning that they live in small, short-lived colonies, with minimal social agreement. Only bumblebees live in social organized societies with a queen, workers and males. The foraging pattern and preference is not consistent either for all bees. Solitary bees have a significa ...
... Halictidae are eusocial, meaning that they live in small, short-lived colonies, with minimal social agreement. Only bumblebees live in social organized societies with a queen, workers and males. The foraging pattern and preference is not consistent either for all bees. Solitary bees have a significa ...
Host Plant Utilization by Grasshoppers
... Diet breadths for each grasshopper species are presented in Table 1. The average number of categories in the diet is 13.7 and the average value of B is 8.3. Confidence intervals (95%) allow the comparison of diet breadths among species. The fewest number of plants species in a diet was found in Erit ...
... Diet breadths for each grasshopper species are presented in Table 1. The average number of categories in the diet is 13.7 and the average value of B is 8.3. Confidence intervals (95%) allow the comparison of diet breadths among species. The fewest number of plants species in a diet was found in Erit ...
How many species of host-specific insects feed on a species of
... (c) ‘uncertains’: insects which, because of death or pupation, could not be tested on more than two plant species; (d) ‘incidentals’: insects which did not feed on any species in the trials (only beetle morphospecies were considered in this last assignment, in order to avoid including parasitized or ...
... (c) ‘uncertains’: insects which, because of death or pupation, could not be tested on more than two plant species; (d) ‘incidentals’: insects which did not feed on any species in the trials (only beetle morphospecies were considered in this last assignment, in order to avoid including parasitized or ...
The Influence of Predator-Prey Population Dynamics on the Long
... one new species is added to the food web, and the populations of all the species then change in response. The new species sometimes adds stably to the ecosystem, sometimes dies out due to competition with existing species, and sometimes causes the extinction of other species. The diversity of speci ...
... one new species is added to the food web, and the populations of all the species then change in response. The new species sometimes adds stably to the ecosystem, sometimes dies out due to competition with existing species, and sometimes causes the extinction of other species. The diversity of speci ...
Chapter 50 Conservation Biology
... individuals taken from a wild population is so great that the population becomes severely reduced in numbers. – Exotic Pets – Hunting / Poaching – Over-Harvesting Fisheries ...
... individuals taken from a wild population is so great that the population becomes severely reduced in numbers. – Exotic Pets – Hunting / Poaching – Over-Harvesting Fisheries ...
Using Biodiversity and Evenness Comparisons Among Plant
... Daubenmire 1968; Barbour et al. 1999). However, description alone could not provide the basis for understanding variation in plant communities. In the late twentieth century, changes in land use, damaging effects of pollution and climate change began to alter vegetation communities. These changes we ...
... Daubenmire 1968; Barbour et al. 1999). However, description alone could not provide the basis for understanding variation in plant communities. In the late twentieth century, changes in land use, damaging effects of pollution and climate change began to alter vegetation communities. These changes we ...
Terrestrial Fauna
... Environmental and other values supported by terrestrial fauna, and their significance Since European settlement, 23 terrestrial fauna species are known to have become extinct in Western Australia and an additional 230 species are listed as threatened or endangered. Some species now only persist in i ...
... Environmental and other values supported by terrestrial fauna, and their significance Since European settlement, 23 terrestrial fauna species are known to have become extinct in Western Australia and an additional 230 species are listed as threatened or endangered. Some species now only persist in i ...
Groote Eylandt group - Anindilyakwa Land Council
... Feral animals: There are relatively few species of feral animals within the Groote Archipelago, and they are generally low abundances, compared to both the NT mainland and some other island groups. Cattle, horse, donkey, buffalo and pig are currently absent from the site and Cane Toads are still tho ...
... Feral animals: There are relatively few species of feral animals within the Groote Archipelago, and they are generally low abundances, compared to both the NT mainland and some other island groups. Cattle, horse, donkey, buffalo and pig are currently absent from the site and Cane Toads are still tho ...
Purrr-fect City - Bountiful Films
... Vancouver Island that was linked to feral cats. The costs are staggering - to us, to the cats, and to other species. The impact of cat predation worldwide is alarming and controversial. Controversial because many cat owners reject the notion that kitty causes carnage. But according to several respec ...
... Vancouver Island that was linked to feral cats. The costs are staggering - to us, to the cats, and to other species. The impact of cat predation worldwide is alarming and controversial. Controversial because many cat owners reject the notion that kitty causes carnage. But according to several respec ...
The Effect of Recycling on Plant Competitive Hierarchies
... quality (ci) and enter the pool of simple N (N2; Schimel and Bennett 2004). In this article, the continuum from fresh litter to soil organic N to mineral N in the soil is represented by three pools of N, each with first-order kinetics. As such, it is a simplification of the highly complex and poorly ...
... quality (ci) and enter the pool of simple N (N2; Schimel and Bennett 2004). In this article, the continuum from fresh litter to soil organic N to mineral N in the soil is represented by three pools of N, each with first-order kinetics. As such, it is a simplification of the highly complex and poorly ...
138.1 KB - Charles Darwin Foundation
... penguins cannot cluster their nests in the open because nesting sites must be shaded so that the adults and eggs do not overheat in the hot sunlight. A common problem for all ground nesting birds is predation. The Galapagos Islands, when compared to continental South America generally, lack predator ...
... penguins cannot cluster their nests in the open because nesting sites must be shaded so that the adults and eggs do not overheat in the hot sunlight. A common problem for all ground nesting birds is predation. The Galapagos Islands, when compared to continental South America generally, lack predator ...
Ball python Python regius (Shaw 1802)
... in Benin, and explain the situation in different ways. For farmers, increases in several crop pest infestations following overpopulation (e.g. rodents, birds, etc.) and its corollaries are associated to a reduction of pythons (see Meirte 1999; Sinsin et al. 1999; Vodounnon 1999). From the collectors ...
... in Benin, and explain the situation in different ways. For farmers, increases in several crop pest infestations following overpopulation (e.g. rodents, birds, etc.) and its corollaries are associated to a reduction of pythons (see Meirte 1999; Sinsin et al. 1999; Vodounnon 1999). From the collectors ...
Free-feeding insect herbivores along environmental gradients in
... The distribution of free-feeding insect herbivores in Brazilian savanna was studied in the National Park of Serra do Cipó. Insect samples were obtained with sweep nets across cerrado (savanna), rupestrian field and altitudinal grassland vegetation from 800 to 1500 m above sea level. We found a low ...
... The distribution of free-feeding insect herbivores in Brazilian savanna was studied in the National Park of Serra do Cipó. Insect samples were obtained with sweep nets across cerrado (savanna), rupestrian field and altitudinal grassland vegetation from 800 to 1500 m above sea level. We found a low ...
Tabby Go Home
... residence. Second, willing owners were asked to collect all the returned prey so I could identify which species, both native and exotic, cats were killing. Third, batted track stations and remotely- triggered cameras allowed monitoring of the movements of cats, as well as of native predators, in the ...
... residence. Second, willing owners were asked to collect all the returned prey so I could identify which species, both native and exotic, cats were killing. Third, batted track stations and remotely- triggered cameras allowed monitoring of the movements of cats, as well as of native predators, in the ...
Genetic diversity
... Copyright © 2008 Pearson Education, Inc., publishing as Pearson Benjamin Cummings ...
... Copyright © 2008 Pearson Education, Inc., publishing as Pearson Benjamin Cummings ...
PREDATOR IDENTITY AND ECOLOGICAL IMPACTS
... Although grouping species has aided in the development of theory, the overall validity of the approach is essentially an empirical question: How similar are species within a trophic level in their effect on population, community, and ecosystem processes? Experiments designed to measure and compare t ...
... Although grouping species has aided in the development of theory, the overall validity of the approach is essentially an empirical question: How similar are species within a trophic level in their effect on population, community, and ecosystem processes? Experiments designed to measure and compare t ...
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.