Soil macrofauna (invertebrates) of
... species. Natural steppes are highly diverse ecosystems, worthy of protection and also of great economic value. However, many steppe species have been decimated or extinct due to habitat loss or landscape fragmentation. Steppes are subject to serious conflicts between agricultural interest and nature ...
... species. Natural steppes are highly diverse ecosystems, worthy of protection and also of great economic value. However, many steppe species have been decimated or extinct due to habitat loss or landscape fragmentation. Steppes are subject to serious conflicts between agricultural interest and nature ...
Species, concepts of. In Levin, S.A.
... kind of evolution, ‘‘speciation,’’ which produces a result qualitatively different from within-population evolution, although it may of course involve the same processes. In ecology, the species is a group of individuals within which variation can often be ignored for the purposes of studying local ...
... kind of evolution, ‘‘speciation,’’ which produces a result qualitatively different from within-population evolution, although it may of course involve the same processes. In ecology, the species is a group of individuals within which variation can often be ignored for the purposes of studying local ...
SudingMS_final_1007_RYS
... Although we discuss functional classification in terms of species and the grouping of species, it also applies to groupings at other levels of organization, such as genotypes or phenotypes of individuals acclimated to different conditions. The issues we address apply to all organisms, although many ...
... Although we discuss functional classification in terms of species and the grouping of species, it also applies to groupings at other levels of organization, such as genotypes or phenotypes of individuals acclimated to different conditions. The issues we address apply to all organisms, although many ...
Why intraspecific trait variation matters in community ecology
... manipulated intraspecific genetic diversity and found corresponding changes in population productivity and stability [25], coexistence [9,26,27], and ecosystem processes [28]. Intraspecific variation can thus have large ecological effects [24–30]. These results motivate the central question of this ...
... manipulated intraspecific genetic diversity and found corresponding changes in population productivity and stability [25], coexistence [9,26,27], and ecosystem processes [28]. Intraspecific variation can thus have large ecological effects [24–30]. These results motivate the central question of this ...
GB NON-NATIVE ORGANISM RISK ASSESSMENT SCHEME
... On average, individuals in introduced populations put on weight more quickly, they reach sexual maturity at a younger age and frequently live at higher population densities than in their native range (Guichón et al. 2003; Bertolino et al. 2012). This may be related to a high hunting pressure in the ...
... On average, individuals in introduced populations put on weight more quickly, they reach sexual maturity at a younger age and frequently live at higher population densities than in their native range (Guichón et al. 2003; Bertolino et al. 2012). This may be related to a high hunting pressure in the ...
Why Are Lionfishes (Pterois, Scorpaenidae) So Rare In Their Native
... Rarity in tropical and subtropical coral reef fishes is an important ecological and biogeographical concept that has received little attention until recently. These studies have emphasized the relative lack of information about the processes that limit the distributions or abundances of rare species ...
... Rarity in tropical and subtropical coral reef fishes is an important ecological and biogeographical concept that has received little attention until recently. These studies have emphasized the relative lack of information about the processes that limit the distributions or abundances of rare species ...
Niche Evolution, Trophic Structure, and Species Turnover in Model
... Loreau 2005; Guill and Drossel 2008). Interference competition promotes diversity in this model by intensifying interactions within species and between species with similar trophic positions. Interference is often incorporated into predator-dependent functional responses, but we follow Loeuille and ...
... Loreau 2005; Guill and Drossel 2008). Interference competition promotes diversity in this model by intensifying interactions within species and between species with similar trophic positions. Interference is often incorporated into predator-dependent functional responses, but we follow Loeuille and ...
A perspective on amphibian conservation in the United States
... country, governmental policy apparently does not have to follow laws established by democratic processes. The same political party that tends to view leadership by the opposing party as illegitimate also tends to view environmental laws as something akin to communism ¢ the enemy of capitalism and fr ...
... country, governmental policy apparently does not have to follow laws established by democratic processes. The same political party that tends to view leadership by the opposing party as illegitimate also tends to view environmental laws as something akin to communism ¢ the enemy of capitalism and fr ...
Untitled - For Studerende
... overall structure of ecological networks by identifying modules within the network and assigns each species with a functional role that describes their structural importance for the network. The topology of complex ecological networks does not have a uniform distribution of interactions among speci ...
... overall structure of ecological networks by identifying modules within the network and assigns each species with a functional role that describes their structural importance for the network. The topology of complex ecological networks does not have a uniform distribution of interactions among speci ...
University of Washington
... Can modern network theory be integrated with distance–decay analyses and used to account for the hierarchical dendritic structure of riverine ecosystems? To what extent do contemporary versus historical factors describing environmental factors and dispersal limitation shape present-day distributions ...
... Can modern network theory be integrated with distance–decay analyses and used to account for the hierarchical dendritic structure of riverine ecosystems? To what extent do contemporary versus historical factors describing environmental factors and dispersal limitation shape present-day distributions ...
Diel vertical migration and feeding of chaetognaths in
... ecosystems (Feigenbaum 1991). In the oligotrophic waters of the eastern Mediterranean, the zooplankton is mainly concentrated in the surface layers and especially the 0–50 m depth strata (Mazzocchi et al. 1997). Various studies on the abundance and vertical distribution of chaetognaths in this area ...
... ecosystems (Feigenbaum 1991). In the oligotrophic waters of the eastern Mediterranean, the zooplankton is mainly concentrated in the surface layers and especially the 0–50 m depth strata (Mazzocchi et al. 1997). Various studies on the abundance and vertical distribution of chaetognaths in this area ...
pygmy rabbit petition outline
... Limited Dispersal Ability Amplifies Effects of Habitat Fragmentation on Increasingly Isolated Populations VI. Historical and Current Distribution in Areas of Concern and Documented Declines and Some Factors Causing Declines Historic Geographical Distribution Pygmy Rabbit Has Long Been on IUCN Red Li ...
... Limited Dispersal Ability Amplifies Effects of Habitat Fragmentation on Increasingly Isolated Populations VI. Historical and Current Distribution in Areas of Concern and Documented Declines and Some Factors Causing Declines Historic Geographical Distribution Pygmy Rabbit Has Long Been on IUCN Red Li ...
Competitive avoidance not edaphic specialization drives vertical
... et al. (2011) found evidence that EM fungal community composition was strongly influenced by horizontal gradients in rooting density, with long- and short-distance exploration type species (sensu Agerer, 2001) being more common in areas of lower and higher root densities, respectively. Although it h ...
... et al. (2011) found evidence that EM fungal community composition was strongly influenced by horizontal gradients in rooting density, with long- and short-distance exploration type species (sensu Agerer, 2001) being more common in areas of lower and higher root densities, respectively. Although it h ...
Ecological Significance of Within- Species Leaf Trait Variability: A
... & Vitousek 2001). Consequently, within-species trait variability may be an important alternative mechanism by which plant communities respond to local scale heterogeneity (Sultan 2000), and could help explain the absence of species diversity-heterogeneity relationships found in some studies (e.g., G ...
... & Vitousek 2001). Consequently, within-species trait variability may be an important alternative mechanism by which plant communities respond to local scale heterogeneity (Sultan 2000), and could help explain the absence of species diversity-heterogeneity relationships found in some studies (e.g., G ...
Investigations of species richness effects on ecosystem functioning
... Diversity of life on Earth is astonishing. Although there are only 1.4-1.8 million documented species, it is believed that up to 30 million species may exist (May 1990). Consequently, we are experiencing a peak in biodiversity - never before has life been so diverse – but we are also experiencing an ...
... Diversity of life on Earth is astonishing. Although there are only 1.4-1.8 million documented species, it is believed that up to 30 million species may exist (May 1990). Consequently, we are experiencing a peak in biodiversity - never before has life been so diverse – but we are also experiencing an ...
Debut of the Seventeen-Year-Old Cicada
... intercepting its falling first-instar offspring in trays placed under their nest trees. His findings showed that survival, estimated by reproductive output, increased more than proportionately with population density; that is, ...
... intercepting its falling first-instar offspring in trays placed under their nest trees. His findings showed that survival, estimated by reproductive output, increased more than proportionately with population density; that is, ...
Why copulatory organs provide so many useful taxonomic characters
... body, and direct selection on copulatory organs (see above) could result in selection for changes in the other that would maintain a good match between the organs (p. 272). Development of physical isolating mechanisms: One explanation, involving direct selection on copulatory organs and differences ...
... body, and direct selection on copulatory organs (see above) could result in selection for changes in the other that would maintain a good match between the organs (p. 272). Development of physical isolating mechanisms: One explanation, involving direct selection on copulatory organs and differences ...
Critical Habitat Survey for Threespine Stickleback Species Pairs
... in only five separate water drainages in the central Strait of Georgia region of coastal British Columbia in Canada: Enos Lake on Vancouver Island; the Vananda Creek drainage, including Priest Lake, on Texada Island; Paxton Lake on Texada Island; Hadley Lake on Lasqueti Island (McPhail 1993); and Li ...
... in only five separate water drainages in the central Strait of Georgia region of coastal British Columbia in Canada: Enos Lake on Vancouver Island; the Vananda Creek drainage, including Priest Lake, on Texada Island; Paxton Lake on Texada Island; Hadley Lake on Lasqueti Island (McPhail 1993); and Li ...
The Global, Phenomena Complex - Woods Hole Oceanographic
... the predatory ctenophore Mnemiopsis leidyi, have also been suggested as possible factors leading to increased HABs is the Black Sea (Lancelot et al., 2002). For decades, HABs have been studied in all areas of the globe, but the underlying reasons for these blooms, the ability to predict their occurr ...
... the predatory ctenophore Mnemiopsis leidyi, have also been suggested as possible factors leading to increased HABs is the Black Sea (Lancelot et al., 2002). For decades, HABs have been studied in all areas of the globe, but the underlying reasons for these blooms, the ability to predict their occurr ...
effects of top predator species on direct
... cover. Treatments were randomly assigned to observation days and terraria with at least six replicates of each treatment. We observed grasshoppers every 30 min from 0700 until darkness and recorded the behavior of each individual (i.e., feeding, resting, moving). If a grasshopper was feeding, we rec ...
... cover. Treatments were randomly assigned to observation days and terraria with at least six replicates of each treatment. We observed grasshoppers every 30 min from 0700 until darkness and recorded the behavior of each individual (i.e., feeding, resting, moving). If a grasshopper was feeding, we rec ...
The tales of two geckos: does dispersal prevent extinction in recently
... studying assignment and dispersal between pairs of habitat patches on a fine geographical scale. We selected three pairs of O. reticulata populations, separated by 150, 550, and 580 m, and three pairs of G. variegata populations, separated by 150, 300, and 1000 m (Table 1). In most cases the distanc ...
... studying assignment and dispersal between pairs of habitat patches on a fine geographical scale. We selected three pairs of O. reticulata populations, separated by 150, 550, and 580 m, and three pairs of G. variegata populations, separated by 150, 300, and 1000 m (Table 1). In most cases the distanc ...
animal mutualistic interactions
... There is a long history of conceptual and empirical work on interaction strength in the context of predator–prey interactions and food webs (reviewed in Laska & Wooton 1998; Berlow et al. 1999, 2004; Wootton & Emmerson 2005). In this body of literature, interaction strength has usually been defined ...
... There is a long history of conceptual and empirical work on interaction strength in the context of predator–prey interactions and food webs (reviewed in Laska & Wooton 1998; Berlow et al. 1999, 2004; Wootton & Emmerson 2005). In this body of literature, interaction strength has usually been defined ...
Common Name: TALLAPOOSA CRAYFISH Scientific Name
... easily collected by holding a net perpendicular to the current downstream of a large rock, then lifting the rock and disturbing the substrate beneath it. If a crayfish is hiding underneath the rock, it will likely move into the net. Shocking downstream into a seine net with a backpack electroshocker ...
... easily collected by holding a net perpendicular to the current downstream of a large rock, then lifting the rock and disturbing the substrate beneath it. If a crayfish is hiding underneath the rock, it will likely move into the net. Shocking downstream into a seine net with a backpack electroshocker ...
Instructor: Dr. Rudy Boonstra Office:
... communication will be done via this mechanism. Check it weekly and more often near assignments. Lecture slides, data files, essay writing tools, news items, etc. will be posted. Announcements: It is YOUR responsibility to be aware of announcements made in class. Be sure to CHECK the homepage on lect ...
... communication will be done via this mechanism. Check it weekly and more often near assignments. Lecture slides, data files, essay writing tools, news items, etc. will be posted. Announcements: It is YOUR responsibility to be aware of announcements made in class. Be sure to CHECK the homepage on lect ...