Network structure beyond food webs: mapping nontrophic and
... rocky shore of Chile have been well documented in published observational and experimental studies conducted in this system over the past 40 years (see Castilla and Paine 1987, Santelices 1990, Fernández et al. 2000, Thiel et al. 2007 for reviews). Non-trophic interactions between intertidal specie ...
... rocky shore of Chile have been well documented in published observational and experimental studies conducted in this system over the past 40 years (see Castilla and Paine 1987, Santelices 1990, Fernández et al. 2000, Thiel et al. 2007 for reviews). Non-trophic interactions between intertidal specie ...
Individuals from different-looking animal species may group together
... Cercopithecus ascanius, respectively) of the Kenyan Kakamega forest can stay in close proximity, taking exactly the same paths of movement through the forest, for periods of up to 12 hours (Cords 1990). As one can intuitively envisage, rates of encounter between individuals of different species in t ...
... Cercopithecus ascanius, respectively) of the Kenyan Kakamega forest can stay in close proximity, taking exactly the same paths of movement through the forest, for periods of up to 12 hours (Cords 1990). As one can intuitively envisage, rates of encounter between individuals of different species in t ...
Network structure beyond food webs: mapping non
... rocky shore of Chile have been well documented in published observational and experimental studies conducted in this system over the past 40 years (see Castilla and Paine 1987, Santelices 1990, Fernández et al. 2000, Thiel et al. 2007 for reviews). Non-trophic interactions between intertidal specie ...
... rocky shore of Chile have been well documented in published observational and experimental studies conducted in this system over the past 40 years (see Castilla and Paine 1987, Santelices 1990, Fernández et al. 2000, Thiel et al. 2007 for reviews). Non-trophic interactions between intertidal specie ...
ABSTRACTS - POPBIO is a conference
... decrease both towards species range margins and along climatic gradients. These changes in habitat availability towards range margins are expected to a) reduce population’s demographic performance as expressed in density and reproductive output, b) reduce population size (both absolute numbers and p ...
... decrease both towards species range margins and along climatic gradients. These changes in habitat availability towards range margins are expected to a) reduce population’s demographic performance as expressed in density and reproductive output, b) reduce population size (both absolute numbers and p ...
Trade-offs and Biological Diversity: Integrative Answers to
... Food abundance (seeds) differs among microhabitats and declines over the course of the night as rodents consume seeds made available by strong afternoon winds (Ziv et al. 1993). Field experiments reveal a trade-off between two species involving body size. The larger G. pyramidum excludes the smaller ...
... Food abundance (seeds) differs among microhabitats and declines over the course of the night as rodents consume seeds made available by strong afternoon winds (Ziv et al. 1993). Field experiments reveal a trade-off between two species involving body size. The larger G. pyramidum excludes the smaller ...
Flora Survey - NT EPA - Northern Territory Government
... During this survey only Cycas armstrongii, listed as Vulnerable (under NT Legislation), was recorded at the Andranangoo site. • A follow-up survey in the late wet season is needed to confirm the absence of other potential rare and threatened species on these sites. Environmental Assessment • Overall ...
... During this survey only Cycas armstrongii, listed as Vulnerable (under NT Legislation), was recorded at the Andranangoo site. • A follow-up survey in the late wet season is needed to confirm the absence of other potential rare and threatened species on these sites. Environmental Assessment • Overall ...
FOOD WEBS
... is antediluvian by these standards, so why this reprint? One answer might be that it is a classic—something to be appreciated by those who study history and the origin of ideas—and that the lessons it teaches may yield insights into present science. To those who read this reprint with history in min ...
... is antediluvian by these standards, so why this reprint? One answer might be that it is a classic—something to be appreciated by those who study history and the origin of ideas—and that the lessons it teaches may yield insights into present science. To those who read this reprint with history in min ...
Great Basin Fact Sheet No. 8: Establishing Big Sagebrush and Other
... root length, and .08 inch stem caliper (C. Fleege, personal communication). Other measurable characteristics are physiological (e.g., dormancy level, measurements of stress resistance such as cold hardiness or root growth potential). Recommendations for use of larger containers or production of larg ...
... root length, and .08 inch stem caliper (C. Fleege, personal communication). Other measurable characteristics are physiological (e.g., dormancy level, measurements of stress resistance such as cold hardiness or root growth potential). Recommendations for use of larger containers or production of larg ...
An in situ study of predator aggregations on scallop (Pecten
... observations made along a fished track (e.g., Medcof and Bourne, 1964; Caddy, 1973; Chapman et al., 1977; Murawski and Serchuk, 1989; Kaiser and Spencer, 1994b). These have all noted increased densities of several fish and invertebrate scavenging species in response to fishing activities, but detail ...
... observations made along a fished track (e.g., Medcof and Bourne, 1964; Caddy, 1973; Chapman et al., 1977; Murawski and Serchuk, 1989; Kaiser and Spencer, 1994b). These have all noted increased densities of several fish and invertebrate scavenging species in response to fishing activities, but detail ...
Bee diversity effects on pollination depend on functional
... Abstract. Biodiversity is important for many ecosystem processes. Global declines in pollinator diversity and abundance have been recognized, raising concerns about a pollination crisis of crops and wild plants. However, experimental evidence for effects of pollinator species diversity on plant repr ...
... Abstract. Biodiversity is important for many ecosystem processes. Global declines in pollinator diversity and abundance have been recognized, raising concerns about a pollination crisis of crops and wild plants. However, experimental evidence for effects of pollinator species diversity on plant repr ...
Progress in Physical Geography
... 1970; Colinvaux, 1979; Street-Perrott et al., 1985). Additionally, species distribution patterns in the humid tropics suggest that much of the forest has spread relatively recently from Pleistocene refuges. Haffer (1969) originally hypothesized that, during the Pleistocene, Amazonian tropical rain f ...
... 1970; Colinvaux, 1979; Street-Perrott et al., 1985). Additionally, species distribution patterns in the humid tropics suggest that much of the forest has spread relatively recently from Pleistocene refuges. Haffer (1969) originally hypothesized that, during the Pleistocene, Amazonian tropical rain f ...
Eutrophication causes speciation reversal in whitefish adaptive
... Out of all of the post-eutrophication samples, only five individuals were assigned to the now extinct summer- and deep-spawning Coregonus gutturosus (Supplementary Table 3). However, the morphological (gillraker counts) and reproductive (winter instead of summer spawning) traits of these individuals ...
... Out of all of the post-eutrophication samples, only five individuals were assigned to the now extinct summer- and deep-spawning Coregonus gutturosus (Supplementary Table 3). However, the morphological (gillraker counts) and reproductive (winter instead of summer spawning) traits of these individuals ...
KREMEN 2005 Managing Ecosystem Services_What Do We Need
... community attributes; nonetheless these functions can often be characterized by the component populations, species, functional groups (guilds), food webs or habitat types that collectively produce them (the ESPs). A related concept is the Ôservice providing unitÕ, which refers to the segment of a po ...
... community attributes; nonetheless these functions can often be characterized by the component populations, species, functional groups (guilds), food webs or habitat types that collectively produce them (the ESPs). A related concept is the Ôservice providing unitÕ, which refers to the segment of a po ...
TOWNSHIP OF CARLING – PASSED NOVEMBER 2012 KEEPING
... WHEREAS the Great Lakes and St. Lawrence represents the largest body of surface fresh water in the world and are a vibrant, diverse ecosystem that is critically important to the economic well-being and the quality of life of the Canadian and U.S. populations in the region; WHEREAS, over 180 invasive ...
... WHEREAS the Great Lakes and St. Lawrence represents the largest body of surface fresh water in the world and are a vibrant, diverse ecosystem that is critically important to the economic well-being and the quality of life of the Canadian and U.S. populations in the region; WHEREAS, over 180 invasive ...
Long-term dynamics of biotic and abiotic resistance to exotic species
... and community dynamics within a single growing season (Gerhardt and Collinge 2007). We now have data from a long-term experiment in vernal pool restoration, including seven years of data on plant community dynamics in pools that were initially subject to different native plant seeding treatments (Co ...
... and community dynamics within a single growing season (Gerhardt and Collinge 2007). We now have data from a long-term experiment in vernal pool restoration, including seven years of data on plant community dynamics in pools that were initially subject to different native plant seeding treatments (Co ...
The Niche
... 16. Sometimes changes in the population of a single species, often called a keystone species, can cause dramatic changes in the structure of a community. 17. ex: if the number of sea otters (predator) < , then the number of sea urchins (prey) >, this caused the kelp forests (the urchins food) to ...
... 16. Sometimes changes in the population of a single species, often called a keystone species, can cause dramatic changes in the structure of a community. 17. ex: if the number of sea otters (predator) < , then the number of sea urchins (prey) >, this caused the kelp forests (the urchins food) to ...
African Herp News 58, December 2012
... from the widespread genera Afrixalus, Hyperolius, and Kassina, and two species of the Ethiopian endemic genus Paracassina, the genus Leptopelis (with six species) is still included, although southern African authors now assign this genus to the family Arthroleptidae. In the Microhylidae, the authors ...
... from the widespread genera Afrixalus, Hyperolius, and Kassina, and two species of the Ethiopian endemic genus Paracassina, the genus Leptopelis (with six species) is still included, although southern African authors now assign this genus to the family Arthroleptidae. In the Microhylidae, the authors ...
Soil phosphorus heterogeneity promotes tree species diversity and
... The niche theory predicts that environmental heterogeneity and species diversity are positively correlated in tropical forests, whereas the neutral theory suggests that stochastic processes are more important in determining species diversity. This study sought to investigate the effects of soil nutr ...
... The niche theory predicts that environmental heterogeneity and species diversity are positively correlated in tropical forests, whereas the neutral theory suggests that stochastic processes are more important in determining species diversity. This study sought to investigate the effects of soil nutr ...
Vascular plants in modern agricultural landscapes of SE Norway
... were widespread across Europe less than one century ago but have declined since then (Van Dijk, 1991). This also holds true for farm ponds (Edvardsen and Økland, 2006a). Formerly, farm ponds could be the only source of water at a farm and they commonly had multiple functions there. At present modern ...
... were widespread across Europe less than one century ago but have declined since then (Van Dijk, 1991). This also holds true for farm ponds (Edvardsen and Økland, 2006a). Formerly, farm ponds could be the only source of water at a farm and they commonly had multiple functions there. At present modern ...
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 ...
spatial habitat heterogeneity influences competition
... drepanolobium growth rate was correlated with the outcome of competition among acacia ants competing for limiting host trees; more subordinate species were replaced by dominants on faster growing trees, while more dominant species tended to be replaced by subordinates on slower growing trees. Howeve ...
... drepanolobium growth rate was correlated with the outcome of competition among acacia ants competing for limiting host trees; more subordinate species were replaced by dominants on faster growing trees, while more dominant species tended to be replaced by subordinates on slower growing trees. Howeve ...
File - Mrs. Schneider`s Science home page
... • When one partner is really small and lives inside of the other partner, the other partner is called the host. • The really small partner can be called a mutualist, a commensalist, or a parasite (depending on the type of relationship). • Sometimes, the really small partner is called the symbiont. T ...
... • When one partner is really small and lives inside of the other partner, the other partner is called the host. • The really small partner can be called a mutualist, a commensalist, or a parasite (depending on the type of relationship). • Sometimes, the really small partner is called the symbiont. T ...
Viewpoint: A theoretical basis for planning woody plant control to
... overgrazing by livestock and failed attempts at brush control (Fulbright 1991) that fire is not a practical tool to reduce brush density. Overgrazing by cattle in certain arid and semiarid landscapeshas resulted in severe soil compaction and manipulations such as heavy discing are required to promot ...
... overgrazing by livestock and failed attempts at brush control (Fulbright 1991) that fire is not a practical tool to reduce brush density. Overgrazing by cattle in certain arid and semiarid landscapeshas resulted in severe soil compaction and manipulations such as heavy discing are required to promot ...
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.