i THE EVOLUTION OF SPECIES’ GEOGRAPHICAL RANGE LIMITS:
... I am not sure I can thank enough all of the people who have contributed in some way to this work, but I will try. First, to my supervisor, Dr. Chris Eckert, for his great dedication to and enthusiasm for the project. His patience, guidance and calm reason in time of crisis were highly valued and wil ...
... I am not sure I can thank enough all of the people who have contributed in some way to this work, but I will try. First, to my supervisor, Dr. Chris Eckert, for his great dedication to and enthusiasm for the project. His patience, guidance and calm reason in time of crisis were highly valued and wil ...
chapter 53
... 4. Species richness on islands depends on island size and distance from the mainland • Because of their size and isolation, islands provide great opportunities for studying some of the biogeographic factors that affect the species diversity of communities. ...
... 4. Species richness on islands depends on island size and distance from the mainland • Because of their size and isolation, islands provide great opportunities for studying some of the biogeographic factors that affect the species diversity of communities. ...
Chapter 8 Diversity and ecosystem function Jan Lepš Dr. Jan Lepš
... species S found on the size of the investigated area A is usually described by the species-area curve (see Rosenzweig 1995 for discussion). Two functional forms are employed: the power curve, usually written as S=c.Az, and the logarithmic curve S=a+b.log(A); c, z, a and b are parameters estimated b ...
... species S found on the size of the investigated area A is usually described by the species-area curve (see Rosenzweig 1995 for discussion). Two functional forms are employed: the power curve, usually written as S=c.Az, and the logarithmic curve S=a+b.log(A); c, z, a and b are parameters estimated b ...
References - Trace: Tennessee Research and Creative Exchange
... potential for these altered levels of foraging to cause shifts in rates of ant-mediated seed dispersal, providing an indirect mechanisms via which climatic warming may alter the plant community. Despite the observed shifts in ant activity, however, I did not find rates of seed dispersal to vary acro ...
... potential for these altered levels of foraging to cause shifts in rates of ant-mediated seed dispersal, providing an indirect mechanisms via which climatic warming may alter the plant community. Despite the observed shifts in ant activity, however, I did not find rates of seed dispersal to vary acro ...
Density-dependent facilitation cascades determine
... not only may the density of basal foundation species influence the density of secondary foundation species in linear or nonlinear ways, but also the density of the secondary foundation species may, in turn, produce density-dependent effects on associated communities. Empirical studies are needed to d ...
... not only may the density of basal foundation species influence the density of secondary foundation species in linear or nonlinear ways, but also the density of the secondary foundation species may, in turn, produce density-dependent effects on associated communities. Empirical studies are needed to d ...
Niche saturation reveals resource partitioning among consumers
... including sampling error and demographical stochasticity. Each model was fit to the untransformed data in all treatments ⁄ blocks simultaneously to use all data and to use the most information possible to parameterize the models. We removed resource partitioning from the model by setting p1 = p2 = p ...
... including sampling error and demographical stochasticity. Each model was fit to the untransformed data in all treatments ⁄ blocks simultaneously to use all data and to use the most information possible to parameterize the models. We removed resource partitioning from the model by setting p1 = p2 = p ...
Biological Synopsis of the colonial tunicates
... the asexual budding of individual zooids or through fusion with closely-related colonies. This fusion process is controlled by a complex allorecognition system that allows the organism to detect the degree of genetic similarity between adjoining colonies. Both species are hermaphroditic and brood la ...
... the asexual budding of individual zooids or through fusion with closely-related colonies. This fusion process is controlled by a complex allorecognition system that allows the organism to detect the degree of genetic similarity between adjoining colonies. Both species are hermaphroditic and brood la ...
Identification of Ecologically and Biologically Significant Areas
... “significant” because of the functions that they serve in the ecosystem and/or because of structural properties. Although structure and function are inter-dependent, an area can be “significant” for either reason. Many of the functional activities like feeding and spawning of fish occur widely throu ...
... “significant” because of the functions that they serve in the ecosystem and/or because of structural properties. Although structure and function are inter-dependent, an area can be “significant” for either reason. Many of the functional activities like feeding and spawning of fish occur widely throu ...
Burdi 1 Sea Star Acrobatics: Testing the
... response. However, none of those studies examined the differences in righting response on different substrata. Eight species of sea stars were used in this study: Three different color variations of Henricia leviuscula (blood red, yellow, and gray arm pitted), Leptasterias hexactis, Pyconopodia hel ...
... response. However, none of those studies examined the differences in righting response on different substrata. Eight species of sea stars were used in this study: Three different color variations of Henricia leviuscula (blood red, yellow, and gray arm pitted), Leptasterias hexactis, Pyconopodia hel ...
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... Whatever the validity or applicability of keystone predation in any particular situation, there has been a renewed interest in and understanding of indirect interactions and their importance in the ecology of complex assemblages (reviewed by Menge, 1997). This was, of course, an older tradition dati ...
... Whatever the validity or applicability of keystone predation in any particular situation, there has been a renewed interest in and understanding of indirect interactions and their importance in the ecology of complex assemblages (reviewed by Menge, 1997). This was, of course, an older tradition dati ...
3. Ecosystems Booklet TN
... intensity; soil moisture/rainfall/humidity; method to ensure no double counting; CREDIT any two correct answers (c) means different/mean less in soil with plants removed; DO NOT CREDIT if difference in mean stated to be valid IGNORE average (but) error bars overlap; ACCEPT cross (over) (could have) ...
... intensity; soil moisture/rainfall/humidity; method to ensure no double counting; CREDIT any two correct answers (c) means different/mean less in soil with plants removed; DO NOT CREDIT if difference in mean stated to be valid IGNORE average (but) error bars overlap; ACCEPT cross (over) (could have) ...
diversity, ecosystem function, and stability of parasitoid
... the applicability of previous modeled or mesocosm community studies to real diverse communities in different habitats remains ambiguous. We exposed standardized nesting resources for naturally occurring communities of cavitynesting bees and wasps and their parasitoids in coastal Ecuador, to test the ...
... the applicability of previous modeled or mesocosm community studies to real diverse communities in different habitats remains ambiguous. We exposed standardized nesting resources for naturally occurring communities of cavitynesting bees and wasps and their parasitoids in coastal Ecuador, to test the ...
Refuge effects of Juncus effusus in grazed, subtropical wetland plant
... IMP. Grazing intensity varies across the ranch, although IMPs usually experience higher grazing pressure than SNPs. For the duration of this study, which covered two wet seasons, (*July 2006–December 2007), average stocking rate was 1.08 cows/ha in IMPs and 0.59 cows/ha in SNPs. However, the IMP and ...
... IMP. Grazing intensity varies across the ranch, although IMPs usually experience higher grazing pressure than SNPs. For the duration of this study, which covered two wet seasons, (*July 2006–December 2007), average stocking rate was 1.08 cows/ha in IMPs and 0.59 cows/ha in SNPs. However, the IMP and ...
Chapter 54
... • The total of a species’ use of biotic and abiotic resources is called the species’ ecological niche • An ecological niche can also be thought of as an organism’s ecological role • Ecologically similar species can coexist in a community if there are one or more significant differences in their nich ...
... • The total of a species’ use of biotic and abiotic resources is called the species’ ecological niche • An ecological niche can also be thought of as an organism’s ecological role • Ecologically similar species can coexist in a community if there are one or more significant differences in their nich ...
Invasions and Extinctions Reshape Coastal
... a classic ‘‘pyramid’’ in shape with decreasing numbers of species with increasing trophic level (Fig. 4A). The differential distribution of invasions and extinctions among trophic groups have already caused measurable changes in the relative distribution of species among trophic levels, even with in ...
... a classic ‘‘pyramid’’ in shape with decreasing numbers of species with increasing trophic level (Fig. 4A). The differential distribution of invasions and extinctions among trophic groups have already caused measurable changes in the relative distribution of species among trophic levels, even with in ...
3 inland biodiversity
... The range forms the Clarke Connors Range subregion of the Central Queensland Coast Bioregion, which lies adjacent to the Brigalow Belt Bioregion to the west, north and south, and the Sarina to Proserpine Lowlands subregion of the Central Queensland Coast to the east. In this respect it is an area of ...
... The range forms the Clarke Connors Range subregion of the Central Queensland Coast Bioregion, which lies adjacent to the Brigalow Belt Bioregion to the west, north and south, and the Sarina to Proserpine Lowlands subregion of the Central Queensland Coast to the east. In this respect it is an area of ...
02 YGP DAR Existing Environment and Baseline Conditions
... the numbers of moose and habitat utilization in the local area. A total of ten moose were observed along 273 km of transect. Initial results suggest approximate animal density of 3.7 moose per 100 km² in these pre-selected habitats. Based on the YGP vegetation studies, the predominant moose habitat ...
... the numbers of moose and habitat utilization in the local area. A total of ten moose were observed along 273 km of transect. Initial results suggest approximate animal density of 3.7 moose per 100 km² in these pre-selected habitats. Based on the YGP vegetation studies, the predominant moose habitat ...
Pages 304-308 - Lakeland Regional High School
... • Conservation geneticists = study genetic attributes of organisms to infer the status of their population • Minimum viable population = how small a population can become before it runs into problems • Metapopulations = a network of subpopulations - Small populations are most vulnerable to extinctio ...
... • Conservation geneticists = study genetic attributes of organisms to infer the status of their population • Minimum viable population = how small a population can become before it runs into problems • Metapopulations = a network of subpopulations - Small populations are most vulnerable to extinctio ...
Axis axis, Chital
... Chital is listed as Least Concern because it occurs over a very wide range within which there are many large subpopulations. Although it is still declining in some sites (particularly outside protected areas), at the species level any such declines are at nowhere near the rate required to qualify fo ...
... Chital is listed as Least Concern because it occurs over a very wide range within which there are many large subpopulations. Although it is still declining in some sites (particularly outside protected areas), at the species level any such declines are at nowhere near the rate required to qualify fo ...
INSECTS ON PLANTS: Diversity of Herbivore Assemblages Revisited
... Plants by Strong, Lawton and Southwood. We scrutinize findings since then, considering analyses of country-wide insect-host catalogs, field studies of local herbivore communities, and comparative studies at different spatial scales. Studies in tropical forests have advanced significantly and offer n ...
... Plants by Strong, Lawton and Southwood. We scrutinize findings since then, considering analyses of country-wide insect-host catalogs, field studies of local herbivore communities, and comparative studies at different spatial scales. Studies in tropical forests have advanced significantly and offer n ...
Mojave Fringe-toed Lizard
... lizard (Callisaurus draconoides). Of these species, only zebra-tailed lizard appears to be a potential competitor for food resources with Mojave fringe-toed lizard. These species are both insectivorous, approximately the same adult size, and likely select prey of similar size. Foraging behavior in t ...
... lizard (Callisaurus draconoides). Of these species, only zebra-tailed lizard appears to be a potential competitor for food resources with Mojave fringe-toed lizard. These species are both insectivorous, approximately the same adult size, and likely select prey of similar size. Foraging behavior in t ...
Interactions between Micro- and Macroparasites Predict
... as a simple average of all estimates of prevalence in the database; as a weighted average of all estimates, with weights based on sample sizes from the individual studies; and averaging first by parasite genera documented in a host species and then creating a simple average of the estimates for each ...
... as a simple average of all estimates of prevalence in the database; as a weighted average of all estimates, with weights based on sample sizes from the individual studies; and averaging first by parasite genera documented in a host species and then creating a simple average of the estimates for each ...
Volume 22
... et al. 2013), and are presumably the main reason why other species of smaller seabirds are restricted to cliffs that are inaccessible to feral cats (Groz et al. 2005). The eradication of feral cats from Corvo Island may therefore benefit the local seabird community. In this study, we estimated the d ...
... et al. 2013), and are presumably the main reason why other species of smaller seabirds are restricted to cliffs that are inaccessible to feral cats (Groz et al. 2005). The eradication of feral cats from Corvo Island may therefore benefit the local seabird community. In this study, we estimated the d ...
The Marine Outcomes Monitoring framework
... illustrating how indices should be developed and presented (Loh, 2002). The ‘State of the Nation’s Ecosystems’ maintained and published by the Heinz Center, also documents status and trend changes in land use patterns and living resource components exclusively in the US. A 2002 report identified spe ...
... illustrating how indices should be developed and presented (Loh, 2002). The ‘State of the Nation’s Ecosystems’ maintained and published by the Heinz Center, also documents status and trend changes in land use patterns and living resource components exclusively in the US. A 2002 report identified spe ...
from uba.ar - Biblioteca Digital de la Facultad de Ciencias
... none were found. Due to the abundant rainfall and the movement of domestic cattle inside the forest patch, most of the pellets were broken. Entire pellets were measured for length and diameter to the nearest 0.1 mm using a caliper and weighed on a digital balance to the nearest 0.01 g. Pellets were ...
... none were found. Due to the abundant rainfall and the movement of domestic cattle inside the forest patch, most of the pellets were broken. Entire pellets were measured for length and diameter to the nearest 0.1 mm using a caliper and weighed on a digital balance to the nearest 0.01 g. Pellets were ...