Understanding Rangeland Biodiversity
... excluded and marginalised, pastoralists and hunter-gatherers. However, rangelands present a paradox for the conservation ethic, however; most are definitely not ‘natural’ and very often prove to be recent formations. The great majority of the world’s rangelands are largely anthropic creations and th ...
... excluded and marginalised, pastoralists and hunter-gatherers. However, rangelands present a paradox for the conservation ethic, however; most are definitely not ‘natural’ and very often prove to be recent formations. The great majority of the world’s rangelands are largely anthropic creations and th ...
Claw morphology, prey size selection and foraging efficiency in
... 1993). Predators that prey on only one type of prey often possess more specialized feeding structures than predators with broader diets. For example, the beaks of red crossbills (Loxia curvirostra), with their mandibular crossings, are specialized to pry open the closed seed cones of conifers, while ...
... 1993). Predators that prey on only one type of prey often possess more specialized feeding structures than predators with broader diets. For example, the beaks of red crossbills (Loxia curvirostra), with their mandibular crossings, are specialized to pry open the closed seed cones of conifers, while ...
Status of the Nemertea as predators in marine ecosystems
... (Johnston, 1837), Lineus viridis (Müller, 1774), Amphiporus lactifloreus (Johnston, 1827–28), Micrura lactea (Hubrecht, 1879) and Parborlasia corrugatus (McIntosh, 1887), all from latitudes >40◦ N or S), yet they are not restricted to these higher latitudes. The nemertean P. peregrina is also a comm ...
... (Johnston, 1837), Lineus viridis (Müller, 1774), Amphiporus lactifloreus (Johnston, 1827–28), Micrura lactea (Hubrecht, 1879) and Parborlasia corrugatus (McIntosh, 1887), all from latitudes >40◦ N or S), yet they are not restricted to these higher latitudes. The nemertean P. peregrina is also a comm ...
The Role of Body Size in Complex Food Webs: A Cold - ePIC
... various statistical food web metrics (such as average food chain length, number/ fraction of basal, intermediate and top species, etc.). These are used to capture the trophic complexity of these webs and, as such, they are useful, but they also have limitations. First of all, these tools may capture ...
... various statistical food web metrics (such as average food chain length, number/ fraction of basal, intermediate and top species, etc.). These are used to capture the trophic complexity of these webs and, as such, they are useful, but they also have limitations. First of all, these tools may capture ...
Recruitment limitation in secondary forests dominated by
... coefficient (Legendre & Legendre 1988), with log(y + 1) transformed stem counts to emphasize rare species and Sørensen’s index, with presence-absence data, to construct distance matrices of species compositional differences between the 64 plots for native trees, shrubs and lianas in each size class. ...
... coefficient (Legendre & Legendre 1988), with log(y + 1) transformed stem counts to emphasize rare species and Sørensen’s index, with presence-absence data, to construct distance matrices of species compositional differences between the 64 plots for native trees, shrubs and lianas in each size class. ...
limiting resources and the regulation of diversity in phytoplankton
... All samples were collected during the summers of 1996 and 1997. Samples were taken at the lake outlets in May, before ice out, and at one main pelagic sampling station in each lake throughout the summer. Collections were made on a weekly basis from both Yellowstone and Jackson Lakes. Samples were co ...
... All samples were collected during the summers of 1996 and 1997. Samples were taken at the lake outlets in May, before ice out, and at one main pelagic sampling station in each lake throughout the summer. Collections were made on a weekly basis from both Yellowstone and Jackson Lakes. Samples were co ...
Differential Behavioral Responses to Water
... less time Þltering at the bottom and middle compared with O. triseriatus, which allocated more time to Þltering at the bottom and middle in the absence of predation risk (Fig. 2). Species Specificity of Cues. There was a high positive correlation between resting and surface, and browsing was highly ...
... less time Þltering at the bottom and middle compared with O. triseriatus, which allocated more time to Þltering at the bottom and middle in the absence of predation risk (Fig. 2). Species Specificity of Cues. There was a high positive correlation between resting and surface, and browsing was highly ...
species with special concern status
... surrounding it begin to or continue to deteriorate. Thus, a Threatened species is one that is already vulnerable as a result of, for example, small population size, restricted range, narrow habitat affinities, significant population decline, etc. Special Concern: Applies to species that warrant spec ...
... surrounding it begin to or continue to deteriorate. Thus, a Threatened species is one that is already vulnerable as a result of, for example, small population size, restricted range, narrow habitat affinities, significant population decline, etc. Special Concern: Applies to species that warrant spec ...
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... small-scale bait station grids in combination with rat traps for the protection of one endangered forest bird species, 5 species of endangered Oahu tree snails, and 9 species of endangered plants in 2 mountain ranges on the island of Oahu. Endangered tree snail and some plant populations are protect ...
... small-scale bait station grids in combination with rat traps for the protection of one endangered forest bird species, 5 species of endangered Oahu tree snails, and 9 species of endangered plants in 2 mountain ranges on the island of Oahu. Endangered tree snail and some plant populations are protect ...
Management Plan for the Banded Killifish
... and abundant submerged aquatic vegetation (e.g. Trautman, 1957; Scott and Crossman, 1964, 1973; Houston, 1990). Qualitative examinations of lakes where this species occurs in Newfoundland are consistent with accounts describing banded killifish habitat elsewhere. A full quantitative and qualitative ...
... and abundant submerged aquatic vegetation (e.g. Trautman, 1957; Scott and Crossman, 1964, 1973; Houston, 1990). Qualitative examinations of lakes where this species occurs in Newfoundland are consistent with accounts describing banded killifish habitat elsewhere. A full quantitative and qualitative ...
Applying the Reference Site Model to Riparian Restoration Sites in
... Unfortunately, these goals can run contrary to each other, and urban restoration projects viewed as restoration success stories cannot always be considered ecologically successful (Palmer et al. 2005). One way to reconcile urban stream restoration goals is through riparian planting designs based on ...
... Unfortunately, these goals can run contrary to each other, and urban restoration projects viewed as restoration success stories cannot always be considered ecologically successful (Palmer et al. 2005). One way to reconcile urban stream restoration goals is through riparian planting designs based on ...
PLANT-POLLINATOR NETWORKS: INCORPORATING INDIVIDUAL VARIATION AND FUNCTIONAL INFORMATION
... Main chapters, Epilogue, and Supplementary Materials and References. The prologue presents an overview of plant-pollinator interaction networks, introduces relevant background information of the specific topics studied in this thesis, and highlights the general objectives. The second part consists o ...
... Main chapters, Epilogue, and Supplementary Materials and References. The prologue presents an overview of plant-pollinator interaction networks, introduces relevant background information of the specific topics studied in this thesis, and highlights the general objectives. The second part consists o ...
Derivation of the Extrinsic Values of Biological Diversity from Its
... wrong of an action). For example, people living in rural areas may have a different frequency distribution of opinions from those living in cities. Thus, the majority of people living in Florida support the reintroduction of Florida panthers to areas where the species was extirpated, yet most rural ...
... wrong of an action). For example, people living in rural areas may have a different frequency distribution of opinions from those living in cities. Thus, the majority of people living in Florida support the reintroduction of Florida panthers to areas where the species was extirpated, yet most rural ...
Beetles of the World Beetles of the World
... become longer or wings to become wider. But scientists are still baffled how animals develop a completely new body part. Studying how beetle horns evolved might help answer the question. A beetle horn is not a horn. Some beetle horns snap together, like pincers. Others are low and curved, like an el ...
... become longer or wings to become wider. But scientists are still baffled how animals develop a completely new body part. Studying how beetle horns evolved might help answer the question. A beetle horn is not a horn. Some beetle horns snap together, like pincers. Others are low and curved, like an el ...
Direct and Indirect Effects of White
... sites that have high deer densities support more similar vegetation communities than do sites with no deer grazing (Rooney 2009; Rooney et al. 2004; BegleyMiller et al. 2014). Deer engineer the forest vegetation community through selective feeding. These direct manipulations of the vegetation commu ...
... sites that have high deer densities support more similar vegetation communities than do sites with no deer grazing (Rooney 2009; Rooney et al. 2004; BegleyMiller et al. 2014). Deer engineer the forest vegetation community through selective feeding. These direct manipulations of the vegetation commu ...
Invasive alien species in protected areas
... or eradicate those alien species which threaten ecosystems, habitats and species” (Article 8 (h). The Conference of the Parties to the Ramsar Convention addresses IAS in coastal and inland wetlands. Resolution VIII/18 (Invasive Species and Wetlands) urges Ramsar Parties, among other, "to address the ...
... or eradicate those alien species which threaten ecosystems, habitats and species” (Article 8 (h). The Conference of the Parties to the Ramsar Convention addresses IAS in coastal and inland wetlands. Resolution VIII/18 (Invasive Species and Wetlands) urges Ramsar Parties, among other, "to address the ...
Impact of an exotic clam, Corbula gibba, on the commercial scallop
... ABSTRACT: Corbula gibba (Olivi, 1792) a small exotic bivalve from the eastern Atlantic and the Mediterranean has been present in Port Phillip Bay, Victoria, Australia, from as early as 1987. C. gibba is widespread, abundant, and possesses characteristics such as fast growth which may confer a compet ...
... ABSTRACT: Corbula gibba (Olivi, 1792) a small exotic bivalve from the eastern Atlantic and the Mediterranean has been present in Port Phillip Bay, Victoria, Australia, from as early as 1987. C. gibba is widespread, abundant, and possesses characteristics such as fast growth which may confer a compet ...
Mimicry in Butterflies: Microscopic Structure
... Some species of South American butterfly have brilliant metallic blue wings. The metallic luster of its wings does not fade even after 100 years. This is because the origin of this coloration is not pigment but rather microscopic structure that is not affected by chemical change. The principle of th ...
... Some species of South American butterfly have brilliant metallic blue wings. The metallic luster of its wings does not fade even after 100 years. This is because the origin of this coloration is not pigment but rather microscopic structure that is not affected by chemical change. The principle of th ...
Teacher`s Resource Guide
... indri and sifaka. As the name implies, sloth lemurs were designed for treetop living, with long arms and legs, limber joints and hook-like hands and feet. These adaptations allowed them to be adept at both leaping and climbing. Palaeopropithecus ingens, the largest, was about the size of an adult ch ...
... indri and sifaka. As the name implies, sloth lemurs were designed for treetop living, with long arms and legs, limber joints and hook-like hands and feet. These adaptations allowed them to be adept at both leaping and climbing. Palaeopropithecus ingens, the largest, was about the size of an adult ch ...
L227 Stick Insects
... Each egg contains a fatty liquid that nourishes the embryo during its development. Incubation time varies with temperature and between species; it can be as short as a month or over a year. ...
... Each egg contains a fatty liquid that nourishes the embryo during its development. Incubation time varies with temperature and between species; it can be as short as a month or over a year. ...
A GENERAL HYPOTHESIS OF SPECIES DIVERSITY Many
... capacity, but this relationship is not essential for the model. 3. Changes in certain environmental variables will affect all competing populations in basically the same way; that is, the population growth rates of all may be increased or decreased by changes in such factors as energy or nutrient av ...
... capacity, but this relationship is not essential for the model. 3. Changes in certain environmental variables will affect all competing populations in basically the same way; that is, the population growth rates of all may be increased or decreased by changes in such factors as energy or nutrient av ...
Stream Crossings - The Nature Conservancy
... channel characteristics.1 When transport of woody debris is disrupted, it affects the distribution and abundance of diverse habitats (e.g., pools, riffles, floodplains) and changes the physical, chemical and biological characteristics of the stream.1,10 Undersize culverts can become clogged with deb ...
... channel characteristics.1 When transport of woody debris is disrupted, it affects the distribution and abundance of diverse habitats (e.g., pools, riffles, floodplains) and changes the physical, chemical and biological characteristics of the stream.1,10 Undersize culverts can become clogged with deb ...
Parasites in Marine Food Webs - Western Washington University
... predators can be divided into typical predators (e.g., trumpet fish, sharks), social predators (e.g., orcas), and micropredators (e.g., leeches). Detritivores (e.g., hagfish, sea cucumbers) are an important free-living consumer strategy in marine systems and are similar to predators that feed on dea ...
... predators can be divided into typical predators (e.g., trumpet fish, sharks), social predators (e.g., orcas), and micropredators (e.g., leeches). Detritivores (e.g., hagfish, sea cucumbers) are an important free-living consumer strategy in marine systems and are similar to predators that feed on dea ...
Zoology of Porites cylindrica: potential for use in
... colony was not as sound as the other colonies on the transect. All the mortality observed on my transects was a result of algal overgrowth. There was no apparent reason for the weakening of the coral colonies that would allow algae to colonize. It is possible that the corals may still be in the proc ...
... colony was not as sound as the other colonies on the transect. All the mortality observed on my transects was a result of algal overgrowth. There was no apparent reason for the weakening of the coral colonies that would allow algae to colonize. It is possible that the corals may still be in the proc ...
Bifrenaria
Bifrenaria, abbreviated Bif. in horticultural trade, is a genus of plant in family Orchidaceae. It contains 20 species found in Panama, Trinidad and South America. There are no known uses for them, but their abundant, and at first glance artificial, flowers, make them favorites of orchid growers.The genus can be split in two clearly distinct groups: one of highly robust plants with large flowers, that encompass the first species to be classified under the genus Bifrenaria; other of more delicate plants with smaller flowers occasionally classified as Stenocoryne or Adipe. There are two additional species that are normally classified as Bifrenaria, but which molecular analysis indicate to belong to different orchid groups entirely. One is Bifrenaria grandis which is endemic to Bolívia and which is now placed in Lacaena, and Bifrenaria steyermarkii, an inhabitant of the northern Amazon Forest, which does not have an alternative classification.