species complex - University of Oklahoma
... genetic association, we do not intend this analysis to generate a rigorous phylogenetic hypothesis because our allozyme study was designed primarily to assess evidence for reproductive isolation among groups. Nonetheless, this analytical approach can provide a useful assessment of some broad pattern ...
... genetic association, we do not intend this analysis to generate a rigorous phylogenetic hypothesis because our allozyme study was designed primarily to assess evidence for reproductive isolation among groups. Nonetheless, this analytical approach can provide a useful assessment of some broad pattern ...
Biological Resources
... which are listed, candidate, or Species of Concern (generally former candidate species in previous classification system of USFWS). The much greater number of species in the USFWS list compared to the CNDDB records is due in part to the inclusion of numerous candidate species, Species of Concern, an ...
... which are listed, candidate, or Species of Concern (generally former candidate species in previous classification system of USFWS). The much greater number of species in the USFWS list compared to the CNDDB records is due in part to the inclusion of numerous candidate species, Species of Concern, an ...
Research frontiers in null model analysis
... or more) are used to generate a frequency histogram of index values expected if the null hypothesis is true. The position of the observed index in the tails of this null distribution is then used to assign a probability value to the pattern ( Manly, 1991), just as in a conventional statistical analy ...
... or more) are used to generate a frequency histogram of index values expected if the null hypothesis is true. The position of the observed index in the tails of this null distribution is then used to assign a probability value to the pattern ( Manly, 1991), just as in a conventional statistical analy ...
Chapter 2
... because they are not obvious and such a diverse group. Other groups such as the nematodes, gastrotrichs, and tardigrades are less studied and less obvious so may contain numerous undescribed species. Why do most aquatic insects leave the water to mate? It allows for dispersal and gene flow. Also aqu ...
... because they are not obvious and such a diverse group. Other groups such as the nematodes, gastrotrichs, and tardigrades are less studied and less obvious so may contain numerous undescribed species. Why do most aquatic insects leave the water to mate? It allows for dispersal and gene flow. Also aqu ...
Conservation Systematics: The Bufo boreas Species Group
... disagreements among “splitters” and “lumpers”) and which criteria should be used to recognize species, but there will be much less contention about the presence of lineages or clades once they are discovered. Due to the current extinction crisis and limited time and funding, inclusive descriptions o ...
... disagreements among “splitters” and “lumpers”) and which criteria should be used to recognize species, but there will be much less contention about the presence of lineages or clades once they are discovered. Due to the current extinction crisis and limited time and funding, inclusive descriptions o ...
View as PDF - Montana State University
... species (ref. 11 and references therein). Such studies offer only limited insight into the operation of the tradeoff at the community level (i.e., across species). Therefore, though it is clear that consumers have some effect on species diversity, it remains unclear whether a competition–defense tra ...
... species (ref. 11 and references therein). Such studies offer only limited insight into the operation of the tradeoff at the community level (i.e., across species). Therefore, though it is clear that consumers have some effect on species diversity, it remains unclear whether a competition–defense tra ...
Mathematical Challenges in Spatial Ecology, Volume 48, Number 11
... biology that deals with organisms’ relations to one another and to the physical environment in which they live.” Examples of such relations are predator-prey interactions and plants competing for resources. Such interactions may be influenced by demographic and environmental fluctuations and occur o ...
... biology that deals with organisms’ relations to one another and to the physical environment in which they live.” Examples of such relations are predator-prey interactions and plants competing for resources. Such interactions may be influenced by demographic and environmental fluctuations and occur o ...
Ecological niche - Biomathematics and Statistics Scotland
... competing species, since its population growth rate decreases to negative values in some conditions. To a good approximation, if we ignore stochastic sampling from a heterogeneous species’ population, species does fill its realized niche. According to Hutchinson’s formalization, niches of different ...
... competing species, since its population growth rate decreases to negative values in some conditions. To a good approximation, if we ignore stochastic sampling from a heterogeneous species’ population, species does fill its realized niche. According to Hutchinson’s formalization, niches of different ...
PDF
... Two-thirds of the surface of the Earth is covered by ocean and inland water. Marine systems have provided food and other natural resources for humans for thousands of years. Fish are a source of food; oil and other sources of energy are vital to modern society. However, with the development of techn ...
... Two-thirds of the surface of the Earth is covered by ocean and inland water. Marine systems have provided food and other natural resources for humans for thousands of years. Fish are a source of food; oil and other sources of energy are vital to modern society. However, with the development of techn ...
Ecological niche , , Jitka Polechov amp David Storch Department of
... straightforward theoretical consequences. may occupy a much narrower range of these conditions in an environment with competing species. According to Hutchinsons formalization. For example. and the realized niche. since its population growth rate decreases to negative values in some conditions. A fu ...
... straightforward theoretical consequences. may occupy a much narrower range of these conditions in an environment with competing species. According to Hutchinsons formalization. For example. and the realized niche. since its population growth rate decreases to negative values in some conditions. A fu ...
COMMUNITY INVASIBILITY, RECRUITMENT LIMITATION, AND GRASSLAND BIODIVERSITY D T
... added to patches of native grassland. Four field seasons after a one-time addition of seed, many added species were still present and reproducing, with plots seeded at the highest rate having species richness that was 83% greater and total plant cover that was 31% greater than controls. Total plant ...
... added to patches of native grassland. Four field seasons after a one-time addition of seed, many added species were still present and reproducing, with plots seeded at the highest rate having species richness that was 83% greater and total plant cover that was 31% greater than controls. Total plant ...
A Field Manual for Seed Collectors SEED COLLECTING FOR THE
... partner institutions all around the world. These partnerships have as their basis the precepts of the Convention on Biological Diversity, in which resources and responsibility are shared equitably by all parties through technology transfer, benefit sharing and capacity building. The MSBP currently ( ...
... partner institutions all around the world. These partnerships have as their basis the precepts of the Convention on Biological Diversity, in which resources and responsibility are shared equitably by all parties through technology transfer, benefit sharing and capacity building. The MSBP currently ( ...
Marine Seaweed Invasions – Fucus Sofia A. Wikström
... Biological invasions are an important issue of global change and an increased understanding of invasion processes is of crucial importance for both conservation managers and international trade. In this thesis, I have studied the invasion of the brown seaweed Fucus evanescens, to investigate the fat ...
... Biological invasions are an important issue of global change and an increased understanding of invasion processes is of crucial importance for both conservation managers and international trade. In this thesis, I have studied the invasion of the brown seaweed Fucus evanescens, to investigate the fat ...
Red swamp crayfish Scientific name: Procambarus clarkii
... and destruction of hydrophytes can impact other trophic levels in the food web, such as competion with native fish that feed on invertebrates (Lodge et al. 2000). ...
... and destruction of hydrophytes can impact other trophic levels in the food web, such as competion with native fish that feed on invertebrates (Lodge et al. 2000). ...
Analysis of interspecific competition in perennial plants using life table
... differences in mating system and differences in ruderalness between species. The role of these two lifehistory traits on the species dynamics was further investigated by Silvertown et al 共2002兲, using standard methods 共ANOVA兲. In this paper, we re-analysed a subset of the data from Silvertown et al ...
... differences in mating system and differences in ruderalness between species. The role of these two lifehistory traits on the species dynamics was further investigated by Silvertown et al 共2002兲, using standard methods 共ANOVA兲. In this paper, we re-analysed a subset of the data from Silvertown et al ...
Population Ecology of Some Warblers of Northeastern
... found, are then cited as the reason competition is not eliminating all but one of the species. Unfortunately, however, differences in food and space requirements are neither always necessary nor always sufficient to prevent competition and permit coexistence. Actually, to permit coexistence it seems ...
... found, are then cited as the reason competition is not eliminating all but one of the species. Unfortunately, however, differences in food and space requirements are neither always necessary nor always sufficient to prevent competition and permit coexistence. Actually, to permit coexistence it seems ...
Traveling wave solutions of a reaction diffusion model for competing
... ðui ; vi Þ ¼ ððw1 z0 Þ=ð1 c11 Þ; ðz0 c11 w1 Þ=ð1 c11 ÞÞ: This rest state can undergo a Hopf bifurcation as one varies c11, giving rise to periodic orbits, see for example [5,11]. In Case 3 there are six rest states, two of which are in the positive quadrant. The stability of these states dep ...
... ðui ; vi Þ ¼ ððw1 z0 Þ=ð1 c11 Þ; ðz0 c11 w1 Þ=ð1 c11 ÞÞ: This rest state can undergo a Hopf bifurcation as one varies c11, giving rise to periodic orbits, see for example [5,11]. In Case 3 there are six rest states, two of which are in the positive quadrant. The stability of these states dep ...
poster michael humboldt nuevo logo
... recorded at each trawl station. The length frequency sample of each trawl was weighted to the total hake catch of the trawl, to the stratum, to the sub-area and finally to the total covered area (see Table1). Frequencies per length interval (1 cm) were regrouped into length intervals of 5 cm. For th ...
... recorded at each trawl station. The length frequency sample of each trawl was weighted to the total hake catch of the trawl, to the stratum, to the sub-area and finally to the total covered area (see Table1). Frequencies per length interval (1 cm) were regrouped into length intervals of 5 cm. For th ...
REVIEW ARTICLE A research strategy for
... research areas in which current understanding is poor. One is the need to understand ecosystem processes and their resilience to long-term environmental change. The second is the need to define and better understand the consequences of direct involvement by the public in the management of islands, i ...
... research areas in which current understanding is poor. One is the need to understand ecosystem processes and their resilience to long-term environmental change. The second is the need to define and better understand the consequences of direct involvement by the public in the management of islands, i ...
I. Natural Resources
... The MDIFW has an inventory of "areas of special concern" for local wildlife. While not subject to direct legal protection, they are important to local wildlife. The only identified area in Orland, however, is an historic bald eagle nest site on Great Pond mountain. There are no state-recognized bald ...
... The MDIFW has an inventory of "areas of special concern" for local wildlife. While not subject to direct legal protection, they are important to local wildlife. The only identified area in Orland, however, is an historic bald eagle nest site on Great Pond mountain. There are no state-recognized bald ...
The geography of body size – challenges of the interspecific approach
... However, Bergmann probably thought that this hypothesis applied mostly to closely related species (especially congenerics) rather than to broader taxonomic groups: ‘If there are genera in which the species differ only in size, the smaller species would demand a warmer climate’ (Bergmann, 1847, p. 63 ...
... However, Bergmann probably thought that this hypothesis applied mostly to closely related species (especially congenerics) rather than to broader taxonomic groups: ‘If there are genera in which the species differ only in size, the smaller species would demand a warmer climate’ (Bergmann, 1847, p. 63 ...
The role of competitive dominance in the invasive ability of the
... occurs when food or other resources are unpredictable. These species usually come into greater conflict with the dominant species than those in the previous category (Vepsäläinen and Pisarski 1982; Hölldobler and Wilson 1990). Also included in this category are ants that make fairly stable food t ...
... occurs when food or other resources are unpredictable. These species usually come into greater conflict with the dominant species than those in the previous category (Vepsäläinen and Pisarski 1982; Hölldobler and Wilson 1990). Also included in this category are ants that make fairly stable food t ...
Woylie declines: what are the causes?
... losses within two to five years with few or no signs of a subsequent recovery. There are now less than 2000 individuals estimated remaining within the last four indigenous populations (Perup, Greater Kingston, Dryandra and Tutanning), which despite the low numbers still support high levels of geneti ...
... losses within two to five years with few or no signs of a subsequent recovery. There are now less than 2000 individuals estimated remaining within the last four indigenous populations (Perup, Greater Kingston, Dryandra and Tutanning), which despite the low numbers still support high levels of geneti ...
Aquatic insects and their societal benefits and risks
... reliable results. Now, several developing countries are drafting protocols for using insects in freshwater biomonitoring. The advantages of biomonitoring with insects can be realized only if the natural fauna of the region is known. Where the species diversity of freshwater insects is poorly known, ...
... reliable results. Now, several developing countries are drafting protocols for using insects in freshwater biomonitoring. The advantages of biomonitoring with insects can be realized only if the natural fauna of the region is known. Where the species diversity of freshwater insects is poorly known, ...
The Economic and Social Aspects of Biodiversity Benefits and Costs
... applied to all farms and were accompanied by improved water quality or health benefits. Forestry Commercial forestry depends similarly on nutrient recycling and pest control. Some forests also retain a value for hunting or a collection of wild food (e.g. fungi). In addition, many forests, natural or ...
... applied to all farms and were accompanied by improved water quality or health benefits. Forestry Commercial forestry depends similarly on nutrient recycling and pest control. Some forests also retain a value for hunting or a collection of wild food (e.g. fungi). In addition, many forests, natural or ...
Biodiversity action plan
This article is about a conservation biology topic. For other uses of BAP, see BAP (disambiguation).A biodiversity action plan (BAP) is an internationally recognized program addressing threatened species and habitats and is designed to protect and restore biological systems. The original impetus for these plans derives from the 1992 Convention on Biological Diversity (CBD). As of 2009, 191 countries have ratified the CBD, but only a fraction of these have developed substantive BAP documents.The principal elements of a BAP typically include: (a) preparing inventories of biological information for selected species or habitats; (b) assessing the conservation status of species within specified ecosystems; (c) creation of targets for conservation and restoration; and (d) establishing budgets, timelines and institutional partnerships for implementing the BAP.