The Impact of Congressman Pombo`s Anti
... n 1973, Congress passed the Endangered Species Act, one of our nation’s most important and successful conservation laws. For more than 30 years, the Endangered Species Act has protected some of our most treasured wildlife, including the bald eagle, gray wolf, peregrine falcon, black-footed ferret an ...
... n 1973, Congress passed the Endangered Species Act, one of our nation’s most important and successful conservation laws. For more than 30 years, the Endangered Species Act has protected some of our most treasured wildlife, including the bald eagle, gray wolf, peregrine falcon, black-footed ferret an ...
Potential problems of removing one invasive species at a time
... Porter-Whitaker et al., 2012; Meza-Lopez & Siemann, 2015). Interactions between these co-occurring invaders are of superlative interest for wildlife management because managers can often only control or eradicate a single invasive species at a time (Glen et al., 2013). Without prior knowledge of inv ...
... Porter-Whitaker et al., 2012; Meza-Lopez & Siemann, 2015). Interactions between these co-occurring invaders are of superlative interest for wildlife management because managers can often only control or eradicate a single invasive species at a time (Glen et al., 2013). Without prior knowledge of inv ...
(Lepidodactylus lugubris) and its expansion in Costa Rica
... only from mountain ranges north of the Balsas Basin, with records from eastern Michoacán, Morelos, México, and northern Guerrero (Flores-Villela and Sánchez-H., 2003; Centenero-Alcalá et al., 2009). The biology of most members of this genus remains poorly documented, and here we report an incident o ...
... only from mountain ranges north of the Balsas Basin, with records from eastern Michoacán, Morelos, México, and northern Guerrero (Flores-Villela and Sánchez-H., 2003; Centenero-Alcalá et al., 2009). The biology of most members of this genus remains poorly documented, and here we report an incident o ...
Genes to ecosystems: exploring the frontiers of
... impacted is probably caused by key quantitative traits of the foundation species, such as condensed tannins in cottonwoods, which, in turn, may have cascading effects on the community structure and ecosystem processes (Schweitzer et al., 2008a,b). Postulate 2 requires that the trait whose effect is ...
... impacted is probably caused by key quantitative traits of the foundation species, such as condensed tannins in cottonwoods, which, in turn, may have cascading effects on the community structure and ecosystem processes (Schweitzer et al., 2008a,b). Postulate 2 requires that the trait whose effect is ...
silvafennicaartic
... sinks in forests (Pan et al. 2011). In Fennoscandia, the majority of land area is covered by forests and most of them are intensively managed for timber production. Intensive management is the main cause of loss of biodiversity in the Nordic boreal forests (Mönkkönen 1999). Nevertheless, it has been ...
... sinks in forests (Pan et al. 2011). In Fennoscandia, the majority of land area is covered by forests and most of them are intensively managed for timber production. Intensive management is the main cause of loss of biodiversity in the Nordic boreal forests (Mönkkönen 1999). Nevertheless, it has been ...
Cercariae (in Snail Host)
... We hold permits allowing us to transport these organisms. To access permit conditions, click here. purchase living specimens without having a disposition strategy in place. There are currently no USDA permits required for this organism. In order to protect our environment, never release a live labor ...
... We hold permits allowing us to transport these organisms. To access permit conditions, click here. purchase living specimens without having a disposition strategy in place. There are currently no USDA permits required for this organism. In order to protect our environment, never release a live labor ...
Fabaceae total N input into these systems ( Woodmansee et al.,... (N) cycle of terrestrial ecosystems: they are often a signifi...
... Growing conditions—Plants were grown in controlled-environment chambers (Conviron, Winnipeg, Canada) under a 12-h photoperiod at two different day/night temperature regimes: 25/20°C (low) or 28/23°C (high). Two chambers were used for each temperature regime to ensure that temperature differences wer ...
... Growing conditions—Plants were grown in controlled-environment chambers (Conviron, Winnipeg, Canada) under a 12-h photoperiod at two different day/night temperature regimes: 25/20°C (low) or 28/23°C (high). Two chambers were used for each temperature regime to ensure that temperature differences wer ...
empirical rules and assembly theory
... roach are abundant in the river itself (L. Brown & P. B. Moyle, unpubl, data). Speckled dace only recently (c. 1985) became established and their present distribution is limited. The remaining six species are largely confined to Pillsbury Reservoir, although individuals are flushed downstream nearly ...
... roach are abundant in the river itself (L. Brown & P. B. Moyle, unpubl, data). Speckled dace only recently (c. 1985) became established and their present distribution is limited. The remaining six species are largely confined to Pillsbury Reservoir, although individuals are flushed downstream nearly ...
Effects of cattle grazing on small mammal communities in the
... Academic editor Michael Somers Additional Information and Declarations can be found on page 11 DOI 10.7717/peerj.2349 Copyright 2016 Cao et al. Distributed under Creative Commons CC-BY 4.0 ...
... Academic editor Michael Somers Additional Information and Declarations can be found on page 11 DOI 10.7717/peerj.2349 Copyright 2016 Cao et al. Distributed under Creative Commons CC-BY 4.0 ...
Oryctolagus cuniculus, European Rabbit
... O. cuniculus can breed throughout the year (uncommon in lagomorphs), though this is limited by climate and resource availability (Bell and Webb 1991). They raise altricial young between three and six at a time, which leave the warren in under a month (Gibb 1990). Females reach sexual maturity on ave ...
... O. cuniculus can breed throughout the year (uncommon in lagomorphs), though this is limited by climate and resource availability (Bell and Webb 1991). They raise altricial young between three and six at a time, which leave the warren in under a month (Gibb 1990). Females reach sexual maturity on ave ...
Sinclair ARE, Mduma S, Brashares JS. 2003. Patterns of predation
... Thus, smaller ungulates should experience greater mortality from opportunistic predation, and we predict their populations should be severely affected by predation. This prediction was tested with data from long-term studies of ungulate mortality rates and their causes. Using the long-term recruitme ...
... Thus, smaller ungulates should experience greater mortality from opportunistic predation, and we predict their populations should be severely affected by predation. This prediction was tested with data from long-term studies of ungulate mortality rates and their causes. Using the long-term recruitme ...
Measuring Biological Diversity
... Disturbed areas are mostly edge species • Simple biodiversity • Dominance of a few species ecologically, numerically ...
... Disturbed areas are mostly edge species • Simple biodiversity • Dominance of a few species ecologically, numerically ...
Native Plant Grow`lh and Seedling Establishment in Soils
... mutual relationships with a wide range of plant species and provide nutrients and plant protection from herbivory and parasites and improve water relations in exchange for phorosynrhates (Smith and Read 1997). Many perennial species are dependent on mycorrhizal symbiosis for optimal nutrient uptake ...
... mutual relationships with a wide range of plant species and provide nutrients and plant protection from herbivory and parasites and improve water relations in exchange for phorosynrhates (Smith and Read 1997). Many perennial species are dependent on mycorrhizal symbiosis for optimal nutrient uptake ...
28.3 What Are The Effects Of Predator–Prey Interactions?
... Copyright © 2009 Pearson Education, Inc.. ...
... Copyright © 2009 Pearson Education, Inc.. ...
An African grassland responds similarly to long
... four levels, phosphorus and lime in a crossed design in 96 plots. In 1951, about 84% of plant cover consisted of Themeda triandra, Tristachya leucothrix and Setaria nigrirostris. Currently, the dominant species are Panicum maximum, Setaria sphacelata and Eragrostis curvula, making up 71% of total bi ...
... four levels, phosphorus and lime in a crossed design in 96 plots. In 1951, about 84% of plant cover consisted of Themeda triandra, Tristachya leucothrix and Setaria nigrirostris. Currently, the dominant species are Panicum maximum, Setaria sphacelata and Eragrostis curvula, making up 71% of total bi ...
Facilitation contributes to Mediterranean woody plant diversity but
... how the competition–facilitation balance affects species diversity at the community level across stress gradients (Soliveres et al., 2011, 2012), with even fewer studies at macroecological scales (Cavieres et al., 2014). One clear connection between HBM and SGH emerges when productivity is limited p ...
... how the competition–facilitation balance affects species diversity at the community level across stress gradients (Soliveres et al., 2011, 2012), with even fewer studies at macroecological scales (Cavieres et al., 2014). One clear connection between HBM and SGH emerges when productivity is limited p ...
Plant species traits are the predominant control on litter
... for long-term litter decomposition within biomes (Berg et al. 1993; Moore et al. 1999; Raich et al. 2006; Parton et al. 2007). In contrast, interspecific differences in green leaf traits and the subsequent quality of litter produced following leaf senescence are associated with the diversity of plan ...
... for long-term litter decomposition within biomes (Berg et al. 1993; Moore et al. 1999; Raich et al. 2006; Parton et al. 2007). In contrast, interspecific differences in green leaf traits and the subsequent quality of litter produced following leaf senescence are associated with the diversity of plan ...
Ecosystems - Learning for a Sustainable Future
... Human activity resulting in loss of diversity is occurring at the species level and within species. These have different impacts and different meanings. 44 The human species has a major impact on other species in many ways: reducing the amount of the earth’s surface available to those other spec ...
... Human activity resulting in loss of diversity is occurring at the species level and within species. These have different impacts and different meanings. 44 The human species has a major impact on other species in many ways: reducing the amount of the earth’s surface available to those other spec ...
Sterling, Bynum, et al. Why Should You Care About Biologic…
... spatially isolated from the areas with highest concentrations of species. For instance, with a few exceptions, low altitude, warm tropical ecosystems encompass greater numbers of species than high altitude, cold temperate environments (see Gaston and Williams, 1996, for general discussion). Scientis ...
... spatially isolated from the areas with highest concentrations of species. For instance, with a few exceptions, low altitude, warm tropical ecosystems encompass greater numbers of species than high altitude, cold temperate environments (see Gaston and Williams, 1996, for general discussion). Scientis ...
Metaâ•`analysis of the effects of small mammal
... be the minimum requirements needed to assess and compare the impact of any kind of small mammal disturbance on any taxa across studies. In one case we excluded a paper because, after corresponding with the author, it was not clear that the plots in habitat where the species occurred included their d ...
... be the minimum requirements needed to assess and compare the impact of any kind of small mammal disturbance on any taxa across studies. In one case we excluded a paper because, after corresponding with the author, it was not clear that the plots in habitat where the species occurred included their d ...
Plants & Ecology Baltic Sea shores and climate change
... algae of marine origin have a northern distribution border in the Quark, where the salinity drops from 5 psu in the south to 3 in the north (Haahtela 1974; Bergström & Bergström 1999). North of the Quark, most species originate from fresh water environments and therefore instead have southern distri ...
... algae of marine origin have a northern distribution border in the Quark, where the salinity drops from 5 psu in the south to 3 in the north (Haahtela 1974; Bergström & Bergström 1999). North of the Quark, most species originate from fresh water environments and therefore instead have southern distri ...
Global Population Dynamics and Hot Spots of Response to Climate
... approach as a replacement for bioclimatic envelope modeling, but rather as a complement to it. Spatial variation in population dynamics identifies hot spots of population response to global climate change In this section we review two recently published examples, and present a third example develope ...
... approach as a replacement for bioclimatic envelope modeling, but rather as a complement to it. Spatial variation in population dynamics identifies hot spots of population response to global climate change In this section we review two recently published examples, and present a third example develope ...
Hibernation and daily torpor minimize mammalian extinctions
... marmots) and glirids (dormice), which are diverse families of rodents containing many hibernators (French 2008) and are of similar size to the hutias, are not listed at all among ...
... marmots) and glirids (dormice), which are diverse families of rodents containing many hibernators (French 2008) and are of similar size to the hutias, are not listed at all among ...
Forest Openings
... and trees. Over time, shrubs and small trees would dominate the site and often in 10 -15 years trees would once again cover the area. These temporary openings provided browse, food, and cover to a variety of wildlife such as ruffed grouse, white-tailed deer, elk, and rabbits. Examples of larger open ...
... and trees. Over time, shrubs and small trees would dominate the site and often in 10 -15 years trees would once again cover the area. These temporary openings provided browse, food, and cover to a variety of wildlife such as ruffed grouse, white-tailed deer, elk, and rabbits. Examples of larger open ...
the use of coastal agricultural fields in virginia as foraging habitat by
... the shorebirds observed on croplands were actively foraging, with only a small proportion roosting. Observations made during the four dawn-to-dusk surveys and at other times suggested that very few shorebirds, if any, used these fields for roosting without spending some time foraging. Therefore, all ...
... the shorebirds observed on croplands were actively foraging, with only a small proportion roosting. Observations made during the four dawn-to-dusk surveys and at other times suggested that very few shorebirds, if any, used these fields for roosting without spending some time foraging. Therefore, all ...
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.