Rotifers: Exquisite Metazoans1 - Integrative and Comparative Biology
... significance, it is synapomorphic with phylum Acanthocephala, indicating a close phylogenetic relationship. Challenges—Rotifers appear to be very different from acanthocephalans. What is the phylogenetic relationship between these taxa? (See also Phylogenetic quandaries.) ...
... significance, it is synapomorphic with phylum Acanthocephala, indicating a close phylogenetic relationship. Challenges—Rotifers appear to be very different from acanthocephalans. What is the phylogenetic relationship between these taxa? (See also Phylogenetic quandaries.) ...
COEXISTENCE OF TEMPORALLY PARTITIONED SPINY MICE
... does not significantly reduce resource overlap between the two species (Kronfeld and Dayan 1999), or it may do so only during the summer months while in winter the two species overlap significantly in a largely vegetarian diet. Kronfeld and Dayan (1999) argue that food and not shelter sites is the f ...
... does not significantly reduce resource overlap between the two species (Kronfeld and Dayan 1999), or it may do so only during the summer months while in winter the two species overlap significantly in a largely vegetarian diet. Kronfeld and Dayan (1999) argue that food and not shelter sites is the f ...
Distribution of the Long-tailed Weasel (Mustela frenata) in Illinois
... (Hall, 1951; Simms, 1979; King, 1989). More recent studies also have documented weasels or weasel sign in Kentucky (DeVan, 1982), Indiana (Gehring and Swihart, 2003; 2004), east central Illinois (Rosenblatt et al., 1999) and central Illinois (Brawn et al., 2002), revealing long-tailed weasel presenc ...
... (Hall, 1951; Simms, 1979; King, 1989). More recent studies also have documented weasels or weasel sign in Kentucky (DeVan, 1982), Indiana (Gehring and Swihart, 2003; 2004), east central Illinois (Rosenblatt et al., 1999) and central Illinois (Brawn et al., 2002), revealing long-tailed weasel presenc ...
The relative contributions of recombination and point mutation to the
... database may seem unrealistic, given the large number of alleles expected within a bacterial species. However, MLST databases containing a few hundred isolates will identify most of the alleles that are present at a significant frequency in the population. Undoubtedly, there are many more alleles pr ...
... database may seem unrealistic, given the large number of alleles expected within a bacterial species. However, MLST databases containing a few hundred isolates will identify most of the alleles that are present at a significant frequency in the population. Undoubtedly, there are many more alleles pr ...
Plant of the Year: Green-flowered Wild Ginger (Asarum wagneri
... of Asarum in North America (Kelly 2001, Whittemore et al. 1997), two are widespread: one in the East (Canadian wild ginger, A. canadense) and one in the West (western wild ginger, A. caudatum). Two are California endemics (Lemmon’s and Hartweg’s wild gingers, A. lemmonii and A. hartwegii), another i ...
... of Asarum in North America (Kelly 2001, Whittemore et al. 1997), two are widespread: one in the East (Canadian wild ginger, A. canadense) and one in the West (western wild ginger, A. caudatum). Two are California endemics (Lemmon’s and Hartweg’s wild gingers, A. lemmonii and A. hartwegii), another i ...
- Wiley Online Library
... Animal diets crucially affect ®tness, yet many aspects of their ultimate determinants are unknown. The distribution and extent of herbivory in lizards, its evolutionary history, and ecological factors that may favour it are discussed. Most lizards are exclusively or primarily carnivorous, yet many s ...
... Animal diets crucially affect ®tness, yet many aspects of their ultimate determinants are unknown. The distribution and extent of herbivory in lizards, its evolutionary history, and ecological factors that may favour it are discussed. Most lizards are exclusively or primarily carnivorous, yet many s ...
2617 Sustainable Arable Farming For an Improved
... was difficult to preserve desirable species • Spring (only) application of herbicide was best for desirable species • Analysis of results is continuing www.saffie.info ...
... was difficult to preserve desirable species • Spring (only) application of herbicide was best for desirable species • Analysis of results is continuing www.saffie.info ...
PDF file - Marshall University
... ventral and lateral surface of metasomal segments, especially segments IV-V and the telson, we observed arrays of multiple cuticular pits, with a single socketed seta emanating from each. Pits varied in diameter and depth, their mutual position was irregular. Number of pits counted on adult females ...
... ventral and lateral surface of metasomal segments, especially segments IV-V and the telson, we observed arrays of multiple cuticular pits, with a single socketed seta emanating from each. Pits varied in diameter and depth, their mutual position was irregular. Number of pits counted on adult females ...
The ecology of Type="Italic">Myrmica ants
... 1996b) and pose difficult questions for evolutionary biologists (see Keller, 1993). However, at the functional level of a colony, it means that worker numbers are not restricted directly by lack of queens. In some populations queen numbers fluctuate in a regular manner, with all nests having many qu ...
... 1996b) and pose difficult questions for evolutionary biologists (see Keller, 1993). However, at the functional level of a colony, it means that worker numbers are not restricted directly by lack of queens. In some populations queen numbers fluctuate in a regular manner, with all nests having many qu ...
2014, vol 24 - Department of Biological Sciences
... Station. On Little Cayman Island, there are copies at the Little Cayman Research Center. Dartmouth faculty from the Department of Biological Sciences, along with two Ph.D. students from Dartmouth’s Ecology and Evolutionary Biology graduate program, advise ca. 15 advanced undergraduate students on th ...
... Station. On Little Cayman Island, there are copies at the Little Cayman Research Center. Dartmouth faculty from the Department of Biological Sciences, along with two Ph.D. students from Dartmouth’s Ecology and Evolutionary Biology graduate program, advise ca. 15 advanced undergraduate students on th ...
Do we have a consistent terminology for species diversity?
... Garland et al. 1992; Martins and Hansen 1997). The Hill indices do not account for either geographic or phylogenetic structure, therefore, when either matter, it would be wise to invoke a different measure of diversity. The one fundamental disagreement that Tuomisto have is whether choice of species ...
... Garland et al. 1992; Martins and Hansen 1997). The Hill indices do not account for either geographic or phylogenetic structure, therefore, when either matter, it would be wise to invoke a different measure of diversity. The one fundamental disagreement that Tuomisto have is whether choice of species ...
Ecological Differentiation in a Hybridizing Cryptic Species Complex By Patrick William Turko
... The hybridizing Daphnia mendotae and D. dentifera (Crustacea: Cladocera) are sympatric throughout much of North America, and are considered a cryptic species complex due to their lack of phylogenetically informative morphological characters. They appear to have no biological mating barriers: hybrids ...
... The hybridizing Daphnia mendotae and D. dentifera (Crustacea: Cladocera) are sympatric throughout much of North America, and are considered a cryptic species complex due to their lack of phylogenetically informative morphological characters. They appear to have no biological mating barriers: hybrids ...
Adaptive Radiation, Ecological Opportunity, and Evolutionary
... species that prey on other members of the clade. The implications of this finding are twofold: first, the more a clade radiates, the more it may provide resources leading to additional divergence; and second, predatory interactions, as well as competitive ones, may occur among species within an adap ...
... species that prey on other members of the clade. The implications of this finding are twofold: first, the more a clade radiates, the more it may provide resources leading to additional divergence; and second, predatory interactions, as well as competitive ones, may occur among species within an adap ...
What is hidden behind the concept of ecosystem efficiency in energy
... and the effective connectance, m, with regard to a sample of 113 community webs reported in Briand and Cohen (1987). (ii) The above correlation is strengthened for a sub-sample of 36 aquatic community webs while, on the other hand, it is almost vanishing for a sub-sample of 21 terrestrial community ...
... and the effective connectance, m, with regard to a sample of 113 community webs reported in Briand and Cohen (1987). (ii) The above correlation is strengthened for a sub-sample of 36 aquatic community webs while, on the other hand, it is almost vanishing for a sub-sample of 21 terrestrial community ...
Phenological diversity in tropical forests
... rather wet without a severe dry season, and monthly precipitation never drops to less than 100 mm (Sanford et al. 1994). Although comparative data are not available from other neotropical forests, a higher proportion of annual flowering species may occur in forests with stronger seasonality. Wright ...
... rather wet without a severe dry season, and monthly precipitation never drops to less than 100 mm (Sanford et al. 1994). Although comparative data are not available from other neotropical forests, a higher proportion of annual flowering species may occur in forests with stronger seasonality. Wright ...
Predicting invasion in grassland ecosystems: is exotic
... Fig. 1, Table S1]. We had the highest replication in North America, and these sites also had a large degree of variation in their degree of invasion. We account for within-continent variability with a regional categorical variable nested within continent. Specifically, we divided the North American ...
... Fig. 1, Table S1]. We had the highest replication in North America, and these sites also had a large degree of variation in their degree of invasion. We account for within-continent variability with a regional categorical variable nested within continent. Specifically, we divided the North American ...
Biological control of root-knot nematodes (Meloidogyne spp.) by the
... cosmopolitan distribution and it is the most important group of plant parasitic nematodes responsible for crop damage estimated to 5% of global yield losses. The Meloidogyne species are considered generalists with an extraordinary wide host range covering nearly all higher plants. Some species are c ...
... cosmopolitan distribution and it is the most important group of plant parasitic nematodes responsible for crop damage estimated to 5% of global yield losses. The Meloidogyne species are considered generalists with an extraordinary wide host range covering nearly all higher plants. Some species are c ...
Predicting invasion in grassland ecosystems: is exotic
... Fig. 1, Table S1]. We had the highest replication in North America, and these sites also had a large degree of variation in their degree of invasion. We account for within-continent variability with a regional categorical variable nested within continent. Specifically, we divided the North American ...
... Fig. 1, Table S1]. We had the highest replication in North America, and these sites also had a large degree of variation in their degree of invasion. We account for within-continent variability with a regional categorical variable nested within continent. Specifically, we divided the North American ...
- Warwick WRAP
... In the early seventies, Robert May addressed the question of whether a generic system of coupled dynamical elements randomly connected to each other would be stable. He found that the larger and more interconnected the system, the more difficult it would be to stabilise [1, 2]. His deduction followe ...
... In the early seventies, Robert May addressed the question of whether a generic system of coupled dynamical elements randomly connected to each other would be stable. He found that the larger and more interconnected the system, the more difficult it would be to stabilise [1, 2]. His deduction followe ...
A spatial theory for characterizing predator–multiprey interactions in
... species aggregation in space can change these predictions. Variation in the spatial abundance and juxtaposition of one prey species can alter predation mortality risk on a second species, via a process known as apparent competition [17–20]. This mechanism causes prey species densities to be negative ...
... species aggregation in space can change these predictions. Variation in the spatial abundance and juxtaposition of one prey species can alter predation mortality risk on a second species, via a process known as apparent competition [17–20]. This mechanism causes prey species densities to be negative ...
2. Marine Biodiversity and species of conservation concern
... The twin island Federation of St. Kitts and Nevis consists of two islands located in the northern part of the Lesser Antilles chain of islands in the Eastern Caribbean. St. Kitts is located at latitude 170 15' north and longitude 620 45' west and Nevis is located 3 km to the south-east, at 170 10' n ...
... The twin island Federation of St. Kitts and Nevis consists of two islands located in the northern part of the Lesser Antilles chain of islands in the Eastern Caribbean. St. Kitts is located at latitude 170 15' north and longitude 620 45' west and Nevis is located 3 km to the south-east, at 170 10' n ...
- NDLScholarship
... and the will to do so. They further contend that continued allegiance to the Noah Principle prevents a real discussion of the choices we must make. Mann and Plummer thus propose an alternative system that would allow society to choose between endangered species and other concerns (e.g., whooping cra ...
... and the will to do so. They further contend that continued allegiance to the Noah Principle prevents a real discussion of the choices we must make. Mann and Plummer thus propose an alternative system that would allow society to choose between endangered species and other concerns (e.g., whooping cra ...
Banks of algal microscopic forms: hypotheses on
... reported that the microscopic stages resumed growth when conditions were improved. The longevity of microscopic stages might be related to seaweed life strategy, but scarce information on this point was found, since, as shown in Table 1, most data refer to long-lived species. The longevity of propag ...
... reported that the microscopic stages resumed growth when conditions were improved. The longevity of microscopic stages might be related to seaweed life strategy, but scarce information on this point was found, since, as shown in Table 1, most data refer to long-lived species. The longevity of propag ...
TAUTOG Tautoga onitis Sometimes known as Blackfish, White Chin
... The majority of fishing occurs in the spring and fall when Tautog is grouped in spawning and pre-migratory schools, making them very susceptible to capture (ASMFC 2006). In addition, Tautog have high rates of site fidelity, meaning they tend to move only short distances from their home sites (Abel e ...
... The majority of fishing occurs in the spring and fall when Tautog is grouped in spawning and pre-migratory schools, making them very susceptible to capture (ASMFC 2006). In addition, Tautog have high rates of site fidelity, meaning they tend to move only short distances from their home sites (Abel e ...
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.