Benthic use of phytoplankton blooms: Agnes M. L. Karlson
... species richness and ecosystem functioning are: (i) niche/trait differentiation, (ii) facilitation and (iii) the selection or dominance effect. The niche is often represented as an n-dimensional space, consisting of environmental conditions, resource levels and densities of other organisms, together ...
... species richness and ecosystem functioning are: (i) niche/trait differentiation, (ii) facilitation and (iii) the selection or dominance effect. The niche is often represented as an n-dimensional space, consisting of environmental conditions, resource levels and densities of other organisms, together ...
Liana cooccurrence patterns in a temperate rainforest
... the same guild were partitioning habitats. For all lianas, we assessed whether the number of host interactions differed between habitats using simple logistic regression. Tests for interspecific differences in habitat preferences differ from tests for guild-based negative co-occurrence patterns (see ...
... the same guild were partitioning habitats. For all lianas, we assessed whether the number of host interactions differed between habitats using simple logistic regression. Tests for interspecific differences in habitat preferences differ from tests for guild-based negative co-occurrence patterns (see ...
Effects of disturbance by Siberian marmots (Marmota sibirica) on
... grazing, which is then referred to as “homogeneous grazing”. Thus, at our site the patch-grazing scenario was played out at a fine scale, and the homogeneous grazing scenario was played out by the marmot at a coarse scale. This is because although the marmots could be selective in their choice of pl ...
... grazing, which is then referred to as “homogeneous grazing”. Thus, at our site the patch-grazing scenario was played out at a fine scale, and the homogeneous grazing scenario was played out by the marmot at a coarse scale. This is because although the marmots could be selective in their choice of pl ...
The Genus Clusia L. - Ruhr
... rDNA and ITS2 is between 619 and 631 bp (Table 1). The ITS1 region (255 to 260 bp) is longer than ITS2 (208 to 210 bp). The outgroup species Hypericum calycinum (L.) exceeds these ranges, exhibiting an ITS1 length of 244 bp and an ITS2 length of 231 bp. The 5.8S DNA consists of 156 bp (sites 278 to ...
... rDNA and ITS2 is between 619 and 631 bp (Table 1). The ITS1 region (255 to 260 bp) is longer than ITS2 (208 to 210 bp). The outgroup species Hypericum calycinum (L.) exceeds these ranges, exhibiting an ITS1 length of 244 bp and an ITS2 length of 231 bp. The 5.8S DNA consists of 156 bp (sites 278 to ...
Korapuki Island restoration plan
... the terrestrial systems of Korapuki I. were modelled using interaction webs, and compared with those on Middle I. Predictive models for systems on Korapuki I. in 20 years were developed. Topographic and geological differences between Middle and Korapuki Is are likely to influence the final form of e ...
... the terrestrial systems of Korapuki I. were modelled using interaction webs, and compared with those on Middle I. Predictive models for systems on Korapuki I. in 20 years were developed. Topographic and geological differences between Middle and Korapuki Is are likely to influence the final form of e ...
African Herp News 58, December 2012
... Endangered species. Pickersgill’s Reed Frog, Hyperolius pickersgilli (Raw 1982) is endemic to the KwaZulu-Natal coast. It is currently known only from less than 20 localities (Tarrant & Armstrong, in press), only two of which occur in Protected Areas (Umlalazi Nature Reserve and iSimangaliso Wetland ...
... Endangered species. Pickersgill’s Reed Frog, Hyperolius pickersgilli (Raw 1982) is endemic to the KwaZulu-Natal coast. It is currently known only from less than 20 localities (Tarrant & Armstrong, in press), only two of which occur in Protected Areas (Umlalazi Nature Reserve and iSimangaliso Wetland ...
Lobel et al.vp - Biodiversität, Evolution und Ökologie der Pflanzen
... Abstract: We studied the relative importance of local habitat conditions and landscape structure for species richness of vascular plants, bryophytes and lichens in dry grasslands on the Baltic island of Öland (Sweden). In addition, we tested whether relationships between species richness and vegetat ...
... Abstract: We studied the relative importance of local habitat conditions and landscape structure for species richness of vascular plants, bryophytes and lichens in dry grasslands on the Baltic island of Öland (Sweden). In addition, we tested whether relationships between species richness and vegetat ...
Do aquatic macrophytes co-occur randomly? An analysis of null
... should be higher than expected by chance. However, when their values are lower than expected by chance, facilitation or environmental affinities among species might be important. Random distributions could be interpreted as the action of many contrasting factors simultaneously, or just by chance. Us ...
... should be higher than expected by chance. However, when their values are lower than expected by chance, facilitation or environmental affinities among species might be important. Random distributions could be interpreted as the action of many contrasting factors simultaneously, or just by chance. Us ...
108. Leong, W. and Pawlik, J.R. 2011
... represents the first systematic analysis of reproductive output for several reef sponge species over a full year. Reproductive output of viviparous species in this study ranged from 0.01 to 0.54%, falling in the same range as ROI reported for other sponge species (Whalan et al., 2007). No sperm were ...
... represents the first systematic analysis of reproductive output for several reef sponge species over a full year. Reproductive output of viviparous species in this study ranged from 0.01 to 0.54%, falling in the same range as ROI reported for other sponge species (Whalan et al., 2007). No sperm were ...
Species indicators of large herbivore density: comparing taxa and
... Forest Science Center of Catalonia, Solsona, Catalonia, Spain Centre for Ecological Research and Applied Forestries, Autonomous University of Barcelona, ...
... Forest Science Center of Catalonia, Solsona, Catalonia, Spain Centre for Ecological Research and Applied Forestries, Autonomous University of Barcelona, ...
Defining drivers of the trophic niche width in reef fish communities
... II. The Layman metrics modified by Cucherousset & Villéger (submitted) ......... ^O! ...
... II. The Layman metrics modified by Cucherousset & Villéger (submitted) ......... ^O! ...
GENETIC VARIATION AMONG POPULATIONS AND SPECIES OF GROUPERS AND CORALGROUPERS
... philosophical approaches to guide the data analysis. Many approaches operate under an assumption (implicitly or explicitly) that mutation is rare; and therefore that complex mutational patterns are less likely than simpler ones (Occam’s razor). Each philosophical approach has algorithms that generat ...
... philosophical approaches to guide the data analysis. Many approaches operate under an assumption (implicitly or explicitly) that mutation is rare; and therefore that complex mutational patterns are less likely than simpler ones (Occam’s razor). Each philosophical approach has algorithms that generat ...
Mimicry as a novel pathway linking biodiversity
... poor songs [19], and may be achieved through the imitation of other species’ vocalizations as an alternative to improvisation and invention of new song elements. It has been shown that song complexity may honestly indicate individual quality and, as such, elicit female response more than monotonous ...
... poor songs [19], and may be achieved through the imitation of other species’ vocalizations as an alternative to improvisation and invention of new song elements. It has been shown that song complexity may honestly indicate individual quality and, as such, elicit female response more than monotonous ...
Is There Current Competition between Sympatric Siberian Weasels
... niche differentiation or resource partitioning to avoid competition (Begon et al. 1986, Ricklefs 1990). Habitat, food, and time have been suggested to be the most important niche dimensions in resource partitioning between species (Pianka 1969, Schoener 1986). If the species fail to differentiate in ...
... niche differentiation or resource partitioning to avoid competition (Begon et al. 1986, Ricklefs 1990). Habitat, food, and time have been suggested to be the most important niche dimensions in resource partitioning between species (Pianka 1969, Schoener 1986). If the species fail to differentiate in ...
An ant–plant by-product mutualism is robust to selective logging of
... used null models in which we ran each of these analyses a further 5,000 times with the same number of species (other than non-natives) removed at random. This methodology allowed us to test whether the observed analytical outputs were significantly different from what would be expected if non-native ...
... used null models in which we ran each of these analyses a further 5,000 times with the same number of species (other than non-natives) removed at random. This methodology allowed us to test whether the observed analytical outputs were significantly different from what would be expected if non-native ...
Keystone species - Department of Conservation
... It seems probable that in any community the removal of individual species would reveal a spectrum of types from so-called redundant species (whose removal has a negligible effect) to keystone species (whose removal causes major changes). The existence of redundant species may be implicit in the ...
... It seems probable that in any community the removal of individual species would reveal a spectrum of types from so-called redundant species (whose removal has a negligible effect) to keystone species (whose removal causes major changes). The existence of redundant species may be implicit in the ...
ASSEMBLAGES: Evidence from the Fossil Record
... response to a disturbance. If other variables show little change, then the system is resistant to changes in the altered parameter. “Variability” is the degree to which a parameter varies over time. Although it can be measured with a statistic such as standard deviation, the duration of the examined ...
... response to a disturbance. If other variables show little change, then the system is resistant to changes in the altered parameter. “Variability” is the degree to which a parameter varies over time. Although it can be measured with a statistic such as standard deviation, the duration of the examined ...
ASSEMBLAGES: Evidence from the Fossil Record
... response to a disturbance. If other variables show little change, then the system is resistant to changes in the altered parameter. “Variability” is the degree to which a parameter varies over time. Although it can be measured with a statistic such as standard deviation, the duration of the examined ...
... response to a disturbance. If other variables show little change, then the system is resistant to changes in the altered parameter. “Variability” is the degree to which a parameter varies over time. Although it can be measured with a statistic such as standard deviation, the duration of the examined ...
Learning objectives
... 7. Describe the questions that might be asked in a study addressing the limits of the geographic distribution of a particular species. 8. Explain how dispersal may contribute to a species’ distribution. 9. Distinguish between the potential and actual range of a species. 10. Explain how habitat selec ...
... 7. Describe the questions that might be asked in a study addressing the limits of the geographic distribution of a particular species. 8. Explain how dispersal may contribute to a species’ distribution. 9. Distinguish between the potential and actual range of a species. 10. Explain how habitat selec ...
Vol. 127, No. 3 The American Naturalist March 1986 SPECIES
... (Hairston 1949, 1973; Krzysik 1979), it has some characteristics of size relationships and ecological distribution not consistent with the assumption that interspecific competition has molded the community. Assuming that evolution under the influence of competition would proceed in the direction of ...
... (Hairston 1949, 1973; Krzysik 1979), it has some characteristics of size relationships and ecological distribution not consistent with the assumption that interspecific competition has molded the community. Assuming that evolution under the influence of competition would proceed in the direction of ...
Provided for non-commercial research and educational use only.
... Countway (2009) hypothesized that the members of the ‘rare biosphere’ not only confer a high level of functional redundancy to a given ecosystem at any given time, but also represent a strong potential for compensatory dynamics under changing environmental conditions. This is based on the fact that ...
... Countway (2009) hypothesized that the members of the ‘rare biosphere’ not only confer a high level of functional redundancy to a given ecosystem at any given time, but also represent a strong potential for compensatory dynamics under changing environmental conditions. This is based on the fact that ...
Reprint
... mechanism can dynamically stabilize coexistence is by no means a guarantee that selection will favor traits that create this stabilizing effect. The most straightforward mechanism to create dynamically stable coexistence in a non-spatial setting is based on the assumption that species use different ...
... mechanism can dynamically stabilize coexistence is by no means a guarantee that selection will favor traits that create this stabilizing effect. The most straightforward mechanism to create dynamically stable coexistence in a non-spatial setting is based on the assumption that species use different ...
Interactions among invaders: community and ecosystem effects of
... of the southwest (Stromberg et al. 2007). For most invaders, however, our knowledge regarding specific ecological impacts remains limited (Pyšek et al. 2008), particularly at scales extending beyond the population level (see Parker et al. 1999). When community or ecosystem-level changes are associa ...
... of the southwest (Stromberg et al. 2007). For most invaders, however, our knowledge regarding specific ecological impacts remains limited (Pyšek et al. 2008), particularly at scales extending beyond the population level (see Parker et al. 1999). When community or ecosystem-level changes are associa ...
Patterns of distribution and composition of sea urchin - LECAR
... urchins in temperate seas is demonstrated by their formation of vast barren areas when at high densities, decreasing habitat complexity and affecting benthic cover and local community dynamics (Wright et al. 2005). Given their important functional role on temperate reefs, sea urchin populations have ...
... urchins in temperate seas is demonstrated by their formation of vast barren areas when at high densities, decreasing habitat complexity and affecting benthic cover and local community dynamics (Wright et al. 2005). Given their important functional role on temperate reefs, sea urchin populations have ...
