What is Biodiversity
... formation of calcium carbonate, the primary component of the shells in two groups of marine organisms coccolithophorids (a phytoplankton) and foraminifera (a single celled, shelled organism that is abundant in many marine environments). When these organisms die, their shells sink to the bottom or di ...
... formation of calcium carbonate, the primary component of the shells in two groups of marine organisms coccolithophorids (a phytoplankton) and foraminifera (a single celled, shelled organism that is abundant in many marine environments). When these organisms die, their shells sink to the bottom or di ...
CHANGES IN PATTERNS OF TERRITORY AND HABITAT OVERLAP IN WOOD- by
... Wiens and Graham 2005; Webb et al. 2006). Overlapping resource needs are most common among closely related species because recently diverged species often share many ecological traits and strategies inherited from their common ancestor. These shared traits and strategies can also cause similar patte ...
... Wiens and Graham 2005; Webb et al. 2006). Overlapping resource needs are most common among closely related species because recently diverged species often share many ecological traits and strategies inherited from their common ancestor. These shared traits and strategies can also cause similar patte ...
evolution of old and new world migration systems
... the types of resources exploited and the changing availability of those resources over time. Indeed, itinerancy does not itself preclude site fidelity. Itinerant Garden Warblers Sylvia borin occupied territories in Uganda for about six weeks until departing in December, but then returned in February ...
... the types of resources exploited and the changing availability of those resources over time. Indeed, itinerancy does not itself preclude site fidelity. Itinerant Garden Warblers Sylvia borin occupied territories in Uganda for about six weeks until departing in December, but then returned in February ...
Food web structure of three guilds of natural enemies: predators
... species were recorded in the study. Aphid density varied among years, and two species of aphid were particularly common in different years. Omitting these species, aphid diversity was similar among years. 5. The parasitoid web showed the lowest connectance while standard food web statistics suggeste ...
... species were recorded in the study. Aphid density varied among years, and two species of aphid were particularly common in different years. Omitting these species, aphid diversity was similar among years. 5. The parasitoid web showed the lowest connectance while standard food web statistics suggeste ...
- Wiley Online Library
... ecosystem restoration program. While reintroductions of species within their historical ranges have become standard conservation tools, introductions within known paleontological ranges—but outside historical ranges—are more controversial, as is the use of taxon substitutions for extinct species. He ...
... ecosystem restoration program. While reintroductions of species within their historical ranges have become standard conservation tools, introductions within known paleontological ranges—but outside historical ranges—are more controversial, as is the use of taxon substitutions for extinct species. He ...
the impacts of introduced freshwater fishes in the
... - Help in reducing mosquito larvae in open waters - Used for feeding carnivorous fishes such as the ...
... - Help in reducing mosquito larvae in open waters - Used for feeding carnivorous fishes such as the ...
High trophic overlap within the seabird community of Argentinean
... hybridize. Although some authors have treated king and blue-eyed cormorants as different morphs of a single species (Rasmussen 1991), we considered them separately in the analysis. We classified an individual as a hybrid based on plumage characteristics following Malacalza (1991). The guanay cormora ...
... hybridize. Although some authors have treated king and blue-eyed cormorants as different morphs of a single species (Rasmussen 1991), we considered them separately in the analysis. We classified an individual as a hybrid based on plumage characteristics following Malacalza (1991). The guanay cormora ...
14. MEGAPODES IN NORTHERN AUSTRALIA: A SUMMARY OF RECENT RESEARCH
... However, it is a discovery during routine experiments on incubation in brush-turkey eggs that is possibly the most important of all these studies: the possibility of temperature-dependent sex ratios. While the phenomenon of temperature-dependent sex determination is well-known among a wide range of ...
... However, it is a discovery during routine experiments on incubation in brush-turkey eggs that is possibly the most important of all these studies: the possibility of temperature-dependent sex ratios. While the phenomenon of temperature-dependent sex determination is well-known among a wide range of ...
Waterbirds of Upper Spencer Gulf
... be higher at times (50,000+), when they disperse to and from inland breeding sites (see Baxter 2003 for details). The area including Upper Spencer Gulf and extending 60 km south to Cowell and Wallaroo supports most of the total number of waders that occur in the whole of Spencer Gulf. The most impor ...
... be higher at times (50,000+), when they disperse to and from inland breeding sites (see Baxter 2003 for details). The area including Upper Spencer Gulf and extending 60 km south to Cowell and Wallaroo supports most of the total number of waders that occur in the whole of Spencer Gulf. The most impor ...
MANGROVE FOREST STRUCTURE ON THE SITTEE RIVER, BELIZE
... height (DBH) were measured. Basal area of each tree was calculated with the formula for a circle (area = 3.1416 x r^2, were r is the radius or one half of the DBH). Height of the tallest tree in each quadrat plot was measured with a Haga altimeter during sampling in 1998. The forest at the mouth of ...
... height (DBH) were measured. Basal area of each tree was calculated with the formula for a circle (area = 3.1416 x r^2, were r is the radius or one half of the DBH). Height of the tallest tree in each quadrat plot was measured with a Haga altimeter during sampling in 1998. The forest at the mouth of ...
Primary consumers
... • Detritivores, which are often called scavengers, consume detritus, the dead material left by all trophic levels. • Decomposers are prokaryotes and fungi, which secrete enzymes that digest molecules in organic material and convert them into ...
... • Detritivores, which are often called scavengers, consume detritus, the dead material left by all trophic levels. • Decomposers are prokaryotes and fungi, which secrete enzymes that digest molecules in organic material and convert them into ...
Ecosystem resistance to invasion and the role of
... scales comes largely from anecdotal observations and descriptions of communities where invaders are generally lacking (Baker, 1986). Several investigators have observed that mixed conifer forests, hardwood forests and dense chaparral are depauperate in introduced species in California (Baker, 1986; ...
... scales comes largely from anecdotal observations and descriptions of communities where invaders are generally lacking (Baker, 1986). Several investigators have observed that mixed conifer forests, hardwood forests and dense chaparral are depauperate in introduced species in California (Baker, 1986; ...
English
... Hydrotechnical constructions (dams, river channelization, dikes, dredging, etc) major cause of disruption in natural river flows: ‐changed hydrology (discharge, flow) ‐habitat fragmentation, ‐loss of floodplains and adjacent wetlands, ‐changes of sediment flux ‐ deterioration of river deltas and e ...
... Hydrotechnical constructions (dams, river channelization, dikes, dredging, etc) major cause of disruption in natural river flows: ‐changed hydrology (discharge, flow) ‐habitat fragmentation, ‐loss of floodplains and adjacent wetlands, ‐changes of sediment flux ‐ deterioration of river deltas and e ...
Spectacular Salvias by David J. Ellis
... hybrids, the genus Salvia is the largest member of the mint family (Lamiaceae). Most salvias are annuals, biennials, or herbaceous perennials, but some are deciduous or evergreen subshrubs in their native habitat. The majority of the species are native to Central and South America, but they are also ...
... hybrids, the genus Salvia is the largest member of the mint family (Lamiaceae). Most salvias are annuals, biennials, or herbaceous perennials, but some are deciduous or evergreen subshrubs in their native habitat. The majority of the species are native to Central and South America, but they are also ...
PDF 1.1 MB - LUCID EAST AFRICA
... intermediate grazing intensities when the dominant is suppressed but other species are not substantially affected. Diversity may be low at the highest grazing intensities if there is only a small pool of grazing tolerant (or avoided) species (Crawley, 1997). Diversity may be reduced either by compet ...
... intermediate grazing intensities when the dominant is suppressed but other species are not substantially affected. Diversity may be low at the highest grazing intensities if there is only a small pool of grazing tolerant (or avoided) species (Crawley, 1997). Diversity may be reduced either by compet ...
ecosystem stability
... • Heritable traits that increase survival chances are called adaptations • There are many niches or habitats and roles available in the environment • As populations adapt they fill new niches and over time may develop into new species ...
... • Heritable traits that increase survival chances are called adaptations • There are many niches or habitats and roles available in the environment • As populations adapt they fill new niches and over time may develop into new species ...
Kamau_LUCID_WP36
... intermediate grazing intensities when the dominant is suppressed but other species are not substantially affected. Diversity may be low at the highest grazing intensities if there is only a small pool of grazing tolerant (or avoided) species (Crawley, 1997). Diversity may be reduced either by compet ...
... intermediate grazing intensities when the dominant is suppressed but other species are not substantially affected. Diversity may be low at the highest grazing intensities if there is only a small pool of grazing tolerant (or avoided) species (Crawley, 1997). Diversity may be reduced either by compet ...
Baltic amber fossil of Garypinus electri Beier provides first evidence
... evolved more than once in the order. Exactly how often is difficult to determine, because new cases may be discovered in the future and our understanding of the phylogeny of the group is not entirely satisfactory. For example, according to Harveys [1992] classification it would be parsimonious to a ...
... evolved more than once in the order. Exactly how often is difficult to determine, because new cases may be discovered in the future and our understanding of the phylogeny of the group is not entirely satisfactory. For example, according to Harveys [1992] classification it would be parsimonious to a ...
Full text in pdf format
... wave-exposed hard bottoms and intertidal sediments. The distribution of Mytilus edulis is restricted to shallow water by intense predation from starfish Asterias rubens and shore crab Carcinus maenas. On shallow sediments, M. edulis are found in mussel beds and in more fragmented forms of patchy ‘is ...
... wave-exposed hard bottoms and intertidal sediments. The distribution of Mytilus edulis is restricted to shallow water by intense predation from starfish Asterias rubens and shore crab Carcinus maenas. On shallow sediments, M. edulis are found in mussel beds and in more fragmented forms of patchy ‘is ...
predicting coexistence in species with continuous ontogenetic niche
... models with two discrete life stages (e.g. larvae and adults), coexistence of two species depends ...
... models with two discrete life stages (e.g. larvae and adults), coexistence of two species depends ...
Mesoamerican Reef
... Through this presentation I would like to propose a new branch of the MAR fund dedicated to research in pursuit of developing scientific methods to quicken the process of reef recovery. Already research has been undertaken to repair coral damage by breeding it on land in tanks of artificial sweetene ...
... Through this presentation I would like to propose a new branch of the MAR fund dedicated to research in pursuit of developing scientific methods to quicken the process of reef recovery. Already research has been undertaken to repair coral damage by breeding it on land in tanks of artificial sweetene ...
Threatened species of the Northern Territory
... In the Northern Territory, it is presently known from only four islands, with a total area of 499 km2. There is no information available on its population size on these islands, but trap success has generally been low. Despite considerable survey effort, there have been no confirmed records from the ...
... In the Northern Territory, it is presently known from only four islands, with a total area of 499 km2. There is no information available on its population size on these islands, but trap success has generally been low. Despite considerable survey effort, there have been no confirmed records from the ...
Phenotypic and phylogenetic evidence for the role of food and
... phylogenetic relationships are potentially less biased than trait data; the phylogeny does not depend on our preconceptions about the types of functional traits that might matter in community assembly or how those traits should be quantified. In addition, phylogenetic relationships might integrate ov ...
... phylogenetic relationships are potentially less biased than trait data; the phylogeny does not depend on our preconceptions about the types of functional traits that might matter in community assembly or how those traits should be quantified. In addition, phylogenetic relationships might integrate ov ...
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.