Organic versus conventional arable farming systems
... within the soil. They play an important part both aboveground, as predators of aphids in agroecosystems (Dennis and Wratten, 1991; Collins et al., 2002), and below-ground, where they prey on collembola, feed on algae, fungi and decaying organic matter (Good and Giller, 1991). It is perhaps not surpr ...
... within the soil. They play an important part both aboveground, as predators of aphids in agroecosystems (Dennis and Wratten, 1991; Collins et al., 2002), and below-ground, where they prey on collembola, feed on algae, fungi and decaying organic matter (Good and Giller, 1991). It is perhaps not surpr ...
LaPolla et al. (2010) - Department of Entomology
... a dimorphic worker caste with reduced maxillary and labial palp segmentation along with a few other minor morphological characters. Since that time the genus has received little taxonomic attention, but it has been suggested that it was a close relative of Paratrechina and Prenolepis (Trager, 1984). ...
... a dimorphic worker caste with reduced maxillary and labial palp segmentation along with a few other minor morphological characters. Since that time the genus has received little taxonomic attention, but it has been suggested that it was a close relative of Paratrechina and Prenolepis (Trager, 1984). ...
A Bug`s Life: Competition Among Species Towards
... “outlawed” or “pitiful” expressions, in fact drones are tolerated in the hive only for those periods when there is a possibility they mate with a queen, mostly in spring and summer, but none in the winter. Cruelly, the workers turn the drones out of the hive to starve to death. On the other hand are ...
... “outlawed” or “pitiful” expressions, in fact drones are tolerated in the hive only for those periods when there is a possibility they mate with a queen, mostly in spring and summer, but none in the winter. Cruelly, the workers turn the drones out of the hive to starve to death. On the other hand are ...
Prediction of bird community composition based on point
... de la Biodiversidad (http://www.conabio.gob.mx) at a resolution of 0.01° (approximately 1 km) grid cells, and the study region was clipped out for analysis; point-occurrence data were rasterized to this same grid system. Prior studies have shown that all four environmental data sets contribute signi ...
... de la Biodiversidad (http://www.conabio.gob.mx) at a resolution of 0.01° (approximately 1 km) grid cells, and the study region was clipped out for analysis; point-occurrence data were rasterized to this same grid system. Prior studies have shown that all four environmental data sets contribute signi ...
chapter 50 - TeacherWeb
... with the changing angle of the sun, producing marked wet and dry seasons around 20° north and 20° south latitude, where many tropical deciduous forests grow. ...
... with the changing angle of the sun, producing marked wet and dry seasons around 20° north and 20° south latitude, where many tropical deciduous forests grow. ...
apex predators enable coexistence
... are threatened or even extinct in their native range. The ecosystems into which the World’s Worst have been introduced provide important habitat for those that are threatened in their native ranges. The conservation status of 33 of the World’s Worst has been assessed for the IUCN’s Red List of Threa ...
... are threatened or even extinct in their native range. The ecosystems into which the World’s Worst have been introduced provide important habitat for those that are threatened in their native ranges. The conservation status of 33 of the World’s Worst has been assessed for the IUCN’s Red List of Threa ...
An Introduction to Ecology and the Biosphere Chapter 50
... The study of the distribution of organisms past and present is called biogeography. There are several factors that influence (limit) an organism’s distribution. 1) dispersal: the movement of individuals away from high population or area of origin. Dispersal can be seen when organisms move to areas w ...
... The study of the distribution of organisms past and present is called biogeography. There are several factors that influence (limit) an organism’s distribution. 1) dispersal: the movement of individuals away from high population or area of origin. Dispersal can be seen when organisms move to areas w ...
Ch52 Lecture notes
... with the changing angle of the sun, producing marked wet and dry seasons around 20° north and 20° south latitude, where many tropical deciduous forests grow. ...
... with the changing angle of the sun, producing marked wet and dry seasons around 20° north and 20° south latitude, where many tropical deciduous forests grow. ...
ch16 (1) - Napa Valley College
... that faces threats that may cause it to become extinct within a short period ...
... that faces threats that may cause it to become extinct within a short period ...
Two Asian fresh water shrimp species found in a
... N. davidi was present in considerable numbers at the time of sampling, in habitats characterized by submerged roots of trees at the upper Gillbach. Neocaridina davidi is known as invasive species from other regions outside of Europe (Englund and Cai 1999; Nishino and Niwa 2004; Niwa 2010). However, ...
... N. davidi was present in considerable numbers at the time of sampling, in habitats characterized by submerged roots of trees at the upper Gillbach. Neocaridina davidi is known as invasive species from other regions outside of Europe (Englund and Cai 1999; Nishino and Niwa 2004; Niwa 2010). However, ...
Coral Reefs of Japan
... the world’s smallest sessile colonial zooxanthellate coral, Stylaraea punctata (Photo. 8). In this way, future detailed studies are expected to add more species to the catalogue of Japanese fauna. In addition, future detailed taxonomic and systematic studies may change the rational treatment of spec ...
... the world’s smallest sessile colonial zooxanthellate coral, Stylaraea punctata (Photo. 8). In this way, future detailed studies are expected to add more species to the catalogue of Japanese fauna. In addition, future detailed taxonomic and systematic studies may change the rational treatment of spec ...
Ziv 2000
... capacities of species with different body sizes in a variety of habitats having different species–habitat matches. For each habitat type, I used the same species– habitat match for all species, implying that species do not differ in the ecological needs that determine their match with the habitat. F ...
... capacities of species with different body sizes in a variety of habitats having different species–habitat matches. For each habitat type, I used the same species– habitat match for all species, implying that species do not differ in the ecological needs that determine their match with the habitat. F ...
Euastacus dharawalus, Fitzroy Falls Crayfish
... Fitzroy Falls Reservoir has been annually stocked with approximately 5,000 Rainbow Trout every year between 2005 and 2012. Additionally, 15,000 Australian Bass were stocked in 2013 (NSW DPI 2015). The Yabby (Cherax destructor) has also been introduced into Fitzroy Falls Reservoir and Wildes Meadow C ...
... Fitzroy Falls Reservoir has been annually stocked with approximately 5,000 Rainbow Trout every year between 2005 and 2012. Additionally, 15,000 Australian Bass were stocked in 2013 (NSW DPI 2015). The Yabby (Cherax destructor) has also been introduced into Fitzroy Falls Reservoir and Wildes Meadow C ...
Diversity, Structure and Regeneration Status of
... categorized Ethiopian vegetation in to nine general categories for the purpose of developing the conservation strategy of Ethiopia. Among the 9 vegetation types of Ethiopia, four of them occur in the dryland regions of the country The four vegetation types that are found in the drylands of Ethiopia ...
... categorized Ethiopian vegetation in to nine general categories for the purpose of developing the conservation strategy of Ethiopia. Among the 9 vegetation types of Ethiopia, four of them occur in the dryland regions of the country The four vegetation types that are found in the drylands of Ethiopia ...
Should Extinction Be Forever
... were electrofused to enucleated domestic goat oocytes, and then the resulting embryos were cultured and transferred to either Spanish ibex or Spanish ibex and domestic goat hybrid females (Folch et al. 2009). One morphologically normal bucardo female was obtained by caesarean section through this me ...
... were electrofused to enucleated domestic goat oocytes, and then the resulting embryos were cultured and transferred to either Spanish ibex or Spanish ibex and domestic goat hybrid females (Folch et al. 2009). One morphologically normal bucardo female was obtained by caesarean section through this me ...
pdf file - UConn - University of Connecticut
... fully explain the observed distribution limits or resulting biogeographic pattern. One potentially important mechanism is dispersal limitation, which is consistent with estimates based on genetic data and mechanistic dispersal models, though other mechanisms including competition may also play a rol ...
... fully explain the observed distribution limits or resulting biogeographic pattern. One potentially important mechanism is dispersal limitation, which is consistent with estimates based on genetic data and mechanistic dispersal models, though other mechanisms including competition may also play a rol ...
Flinders Ranges Purple-spotted Gudgeon
... Ranges in rocky stream habitat areas that are maintained by springs thought to come from local rock aquifers. In other areas of the Flinders Ranges they can be found in isolated water holes along rocky creeks. They can only move to new areas during flooding events. They prefer slow flowing to still ...
... Ranges in rocky stream habitat areas that are maintained by springs thought to come from local rock aquifers. In other areas of the Flinders Ranges they can be found in isolated water holes along rocky creeks. They can only move to new areas during flooding events. They prefer slow flowing to still ...
unit 11 ecosystem stability
... limiting factor that it can tolerate. Between these two extremes alone the animal can function efficiently. It is not always easy to determine these limits, however. It is also known now that a plant or animal may have a wide range of tolerance for one factor in the environment, but a comparatively ...
... limiting factor that it can tolerate. Between these two extremes alone the animal can function efficiently. It is not always easy to determine these limits, however. It is also known now that a plant or animal may have a wide range of tolerance for one factor in the environment, but a comparatively ...
Biodiversity
... innumerable species, the potential of which is not as yet known. It would therefore be prudent to not only conserve the species we already have information about, but also species we have not yet identified and described from economic point of view. Taxus baccata, a tree found in the Sub-Himalayan r ...
... innumerable species, the potential of which is not as yet known. It would therefore be prudent to not only conserve the species we already have information about, but also species we have not yet identified and described from economic point of view. Taxus baccata, a tree found in the Sub-Himalayan r ...
as a PDF
... attempt to colonise one at a time; (III) colonization density is arbitrarily low relative to Lotka–Volterra equilibrium densities mimicking colonization when rare; and (IV) Lotka–Volterra dynamics and eigenvalue analysis are used to estimate community stability. The first three assumptions do not co ...
... attempt to colonise one at a time; (III) colonization density is arbitrarily low relative to Lotka–Volterra equilibrium densities mimicking colonization when rare; and (IV) Lotka–Volterra dynamics and eigenvalue analysis are used to estimate community stability. The first three assumptions do not co ...
Understanding and confronting species uncertainty in biology and
... organisms to evolve together: gene exchange and ecological equivalence (or demographic exchangeability). Both processes, alone or together, can cause genetic drift and adaptations to be shared by a group of organisms, and cause that group to evolve cohesively and separately from other such groups. O ...
... organisms to evolve together: gene exchange and ecological equivalence (or demographic exchangeability). Both processes, alone or together, can cause genetic drift and adaptations to be shared by a group of organisms, and cause that group to evolve cohesively and separately from other such groups. O ...
Chapter 3: Ecosystems, Ecoregions and Biodiversity
... of a species or an attack by disease, than are less diverse ecosystems. For example, if a predator consumes four species of prey and one of those species dies out, the predator still has three prey species – not as much diversity, but probably enough for the predator to continue to survive in that s ...
... of a species or an attack by disease, than are less diverse ecosystems. For example, if a predator consumes four species of prey and one of those species dies out, the predator still has three prey species – not as much diversity, but probably enough for the predator to continue to survive in that s ...
Chapter 52 Notes
... southward with the changing angle of the sun, producing marked wet and dry seasons around 20° north and 20° south latitude, where many tropical deciduous forests grow. ...
... southward with the changing angle of the sun, producing marked wet and dry seasons around 20° north and 20° south latitude, where many tropical deciduous forests grow. ...
Richness and species composition of arboreal arthropods affected
... were selected to include values observed in 90% of the plots; there were up to three outlying plots with lower abundances within each trophic comparison. For these outlying plots, the observed species number was used (Kneitel and Miller 2002). Examination of rarefaction plots revealed no changes in ...
... were selected to include values observed in 90% of the plots; there were up to three outlying plots with lower abundances within each trophic comparison. For these outlying plots, the observed species number was used (Kneitel and Miller 2002). Examination of rarefaction plots revealed no changes in ...
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.