Studies and reconstructions of dire wolf (Canis dirus) and Grey wolf
... Canids have a relatively unreduced dental formula of 3142/3143 [numbers in sequence represent incisors, canines, premolars, and molars in the upper (left half before the oblique) and the lower (right half after the oblique) teeth] and relatively unmodified molars except for the morphology of the car ...
... Canids have a relatively unreduced dental formula of 3142/3143 [numbers in sequence represent incisors, canines, premolars, and molars in the upper (left half before the oblique) and the lower (right half after the oblique) teeth] and relatively unmodified molars except for the morphology of the car ...
Evidence for a Mu¨ llerian mimetic radiation in Asian pitvipers
... hypothesis of Müllerian mimicry for the pitvipers in Southeast Asia using a phylogeny derived from DNA sequences from four combined mitochondrial regions. Mantel matrix correlation tests show that conspicuous red colour pattern elements are significantly associated with sympatric and parapatric pop ...
... hypothesis of Müllerian mimicry for the pitvipers in Southeast Asia using a phylogeny derived from DNA sequences from four combined mitochondrial regions. Mantel matrix correlation tests show that conspicuous red colour pattern elements are significantly associated with sympatric and parapatric pop ...
Notes and Comments
... MacArthur’s (1957) original broken-stick model was constructed to predict the relative abundances of species in a community. Lehman and Tilman (2000) altered this model to study stability under the assumption that resources were randomly partitioned among competitors. This variation stems from the n ...
... MacArthur’s (1957) original broken-stick model was constructed to predict the relative abundances of species in a community. Lehman and Tilman (2000) altered this model to study stability under the assumption that resources were randomly partitioned among competitors. This variation stems from the n ...
Parasites, diversity and the ecosystem.
... parasitism: they can generate diversity but cause extinction, they may castrate a host but increase its growth rate, they can stimulate an immune response but at the same time encourage a secondary chronic infection. Parasites inhabit individual hosts that are distributed as discrete patches, much l ...
... parasitism: they can generate diversity but cause extinction, they may castrate a host but increase its growth rate, they can stimulate an immune response but at the same time encourage a secondary chronic infection. Parasites inhabit individual hosts that are distributed as discrete patches, much l ...
Action Plan No.7 - Environment, Planning and Sustainable
... adult S. plana and the females are so much more inconspicuous than the males that no population estimates were attempted at York Park. A 1:1 sex ratio would give a population density of 3500 per hectare. A two year life cycle would mean that double the number of adults observed are potentially prese ...
... adult S. plana and the females are so much more inconspicuous than the males that no population estimates were attempted at York Park. A 1:1 sex ratio would give a population density of 3500 per hectare. A two year life cycle would mean that double the number of adults observed are potentially prese ...
Biodiversity: an introduction - European Commission
... Quantifying biodiversity is difficult as it has many components that cannot be conveyed in a single number. Three common methods exist: 1. Numbers: The number of species in a particular area, the number of alleles in a locus, or indeed the number of taxonomic or functional groups in an ecosystem, al ...
... Quantifying biodiversity is difficult as it has many components that cannot be conveyed in a single number. Three common methods exist: 1. Numbers: The number of species in a particular area, the number of alleles in a locus, or indeed the number of taxonomic or functional groups in an ecosystem, al ...
9-12 - Wave Foundation
... Penguins, like other aquatic birds, also have webbed feet for better locomotion in the water. Penguins have several unique adaptations that help them survive in their environment. Penguins are black on the back and white on the front, which is observed as a type of camouflage known as countershading ...
... Penguins, like other aquatic birds, also have webbed feet for better locomotion in the water. Penguins have several unique adaptations that help them survive in their environment. Penguins are black on the back and white on the front, which is observed as a type of camouflage known as countershading ...
Role and consequences of fish diversity in the functioning of African
... The need for a better understanding of the role of biodiversity in the functioning of aquatic ecosystems has been raised recently by several authors. If the question is not entirely new, its formulation is. It is therefore the opportunity to re-examine the pool of data already available in order to ...
... The need for a better understanding of the role of biodiversity in the functioning of aquatic ecosystems has been raised recently by several authors. If the question is not entirely new, its formulation is. It is therefore the opportunity to re-examine the pool of data already available in order to ...
Effects of land use on plant diversity
... and modification of the natural environment. At regional and local scales, numerous studies world-wide have examined land use and its effects on plant diversity, but evidence for declining species diversity is mixed. This is because, first, land use comes in many variations, hampering comparisons of ...
... and modification of the natural environment. At regional and local scales, numerous studies world-wide have examined land use and its effects on plant diversity, but evidence for declining species diversity is mixed. This is because, first, land use comes in many variations, hampering comparisons of ...
Allocating CSR plant functional types: the use of leaf
... et al. 2010a; Pierce et al. 2012), providing ‘a dependable common reference frame for the quantitative comparison of the wider primary adaptive strategies of plants from highly contrasting habitats’ (Pierce et al. 2012). Notably, Hodgson et al. (1999) use of whole-plant traits, which do not allow ta ...
... et al. 2010a; Pierce et al. 2012), providing ‘a dependable common reference frame for the quantitative comparison of the wider primary adaptive strategies of plants from highly contrasting habitats’ (Pierce et al. 2012). Notably, Hodgson et al. (1999) use of whole-plant traits, which do not allow ta ...
Relationship of calling intensity to - Research Online
... We recognise that the rain that fell at the search sites may not correspond exactly with that recorded at the weather station, but should be similar in most circumstances. The relatively large number of readings available should also compensate for any variations that may have occurred through this ...
... We recognise that the rain that fell at the search sites may not correspond exactly with that recorded at the weather station, but should be similar in most circumstances. The relatively large number of readings available should also compensate for any variations that may have occurred through this ...
as a PDF
... KwaZulu-Natal, South Africa. 2 Our goals were to examine plant strategy theory, using grass species that differed widely in various traits and in their response to environmental influences. More specifically, we wished to examine whether the importance of competition was less in low fertility or reg ...
... KwaZulu-Natal, South Africa. 2 Our goals were to examine plant strategy theory, using grass species that differed widely in various traits and in their response to environmental influences. More specifically, we wished to examine whether the importance of competition was less in low fertility or reg ...
Fulltext - Jultika
... Rare and elusive species are difficult to study, because they are usually secretive, solitary, occur at low densities and have large home ranges. Wolverines (Gulo gulo) can both hunt and scavenge for food. In Fennoscandia, wolverines co-exist with either wild or semi-domesticated reindeer, which con ...
... Rare and elusive species are difficult to study, because they are usually secretive, solitary, occur at low densities and have large home ranges. Wolverines (Gulo gulo) can both hunt and scavenge for food. In Fennoscandia, wolverines co-exist with either wild or semi-domesticated reindeer, which con ...
Sustaining multiple ecosystem functions in grassland communities requires higher biodiversity
... s human-driven ecosystem simplification and species losses accelerate worldwide, a growing body of experimental and theoretical literature has emerged to examine the effects of biodiversity losses on ecosystem functioning. Syntheses in this field suggest that the relationship between species richness ...
... s human-driven ecosystem simplification and species losses accelerate worldwide, a growing body of experimental and theoretical literature has emerged to examine the effects of biodiversity losses on ecosystem functioning. Syntheses in this field suggest that the relationship between species richness ...
Species Richness and the Temporal Stability of Biomass Production
... stable? If so, why? And if not, why not? These questions have fascinated ecologists for generations, both because of the fundamental scientific challenges that they pose and their deep implications for ecosystem management, where sustainability and reduced risk are often primary goals. Today, the sp ...
... stable? If so, why? And if not, why not? These questions have fascinated ecologists for generations, both because of the fundamental scientific challenges that they pose and their deep implications for ecosystem management, where sustainability and reduced risk are often primary goals. Today, the sp ...
Towards an Evolutionary Model of Animal-Associated
... arise through mutation, which occur at approximately 10−7/bp/replication [54]. This rate can be higher when selection pressures are continuously changing [54] or in the presence of mutagens. In addition, microbes are amenable to HGT, which appears to be of considerable influence in intraspecies geno ...
... arise through mutation, which occur at approximately 10−7/bp/replication [54]. This rate can be higher when selection pressures are continuously changing [54] or in the presence of mutagens. In addition, microbes are amenable to HGT, which appears to be of considerable influence in intraspecies geno ...
Supplemental Methods and Figure Legends
... respectively, the HHF2, HHT2, and HHT2-HHF2 segments of pRB648 with their P. angusta counterparts. Plasmid pRB666 contains the P. angusta HHT2Pang-HHF2Pang insert from pRB654 ...
... respectively, the HHF2, HHT2, and HHT2-HHF2 segments of pRB648 with their P. angusta counterparts. Plasmid pRB666 contains the P. angusta HHT2Pang-HHF2Pang insert from pRB654 ...
Local homology recognition and distance
... as a word or k-tuple. Related sequences tend to have more kmers in common than expected by chance, provided that k is not too large and the divergence is not too great. Many sequence comparison methods based on k-mer counting have been proposed in the literature (reviewed in 14). The statistics of k ...
... as a word or k-tuple. Related sequences tend to have more kmers in common than expected by chance, provided that k is not too large and the divergence is not too great. Many sequence comparison methods based on k-mer counting have been proposed in the literature (reviewed in 14). The statistics of k ...
Measuring the diversity of what? And for what purpose?
... both of which develop indices in which different species are given different weight. The first strand, which has evolved mainly in ecology, weighs different species according to their relative abundance in the system. This is vindicated by the observation that the functional role of species may vary ...
... both of which develop indices in which different species are given different weight. The first strand, which has evolved mainly in ecology, weighs different species according to their relative abundance in the system. This is vindicated by the observation that the functional role of species may vary ...
Local homology recognition and distance measures in linear time
... as a word or k-tuple. Related sequences tend to have more kmers in common than expected by chance, provided that k is not too large and the divergence is not too great. Many sequence comparison methods based on k-mer counting have been proposed in the literature (reviewed in 14). The statistics of k ...
... as a word or k-tuple. Related sequences tend to have more kmers in common than expected by chance, provided that k is not too large and the divergence is not too great. Many sequence comparison methods based on k-mer counting have been proposed in the literature (reviewed in 14). The statistics of k ...
Arabidopsis Gene and cDNA Encoding Cell
... fragment containing Atbfructl was identified by screening a genomic library (EMBL3, Clontech, Palo Alto, CA) with a 1kb fragment from a cDNA encoding a cell-wall invertase in D. carota (Sturm and Chrispeels, 1990). The Atbfructl cDNA clone was identified by screening an A. thaliana cDNA library with ...
... fragment containing Atbfructl was identified by screening a genomic library (EMBL3, Clontech, Palo Alto, CA) with a 1kb fragment from a cDNA encoding a cell-wall invertase in D. carota (Sturm and Chrispeels, 1990). The Atbfructl cDNA clone was identified by screening an A. thaliana cDNA library with ...
Causes and Consequences of Thermal Tolerance Limits in Rocky
... occur within the normal temperature range over which an organism lives. Thermal effects that occur within this range could significantly alter species interactions and community structure if those interactions are strong (Sanford, 1999) but do not have fitness consequences. Thermal effects that occu ...
... occur within the normal temperature range over which an organism lives. Thermal effects that occur within this range could significantly alter species interactions and community structure if those interactions are strong (Sanford, 1999) but do not have fitness consequences. Thermal effects that occu ...
Edible insects as a natural resource
... that efforts in edible insect management ought to focus on edible insect species with the greatest potential and value. These principles are particularly important for forestry, ecology and entomology experts. However, insect conservation efforts will remain futile without adequate support from nati ...
... that efforts in edible insect management ought to focus on edible insect species with the greatest potential and value. These principles are particularly important for forestry, ecology and entomology experts. However, insect conservation efforts will remain futile without adequate support from nati ...