Ch 56 Notes - Dublin City Schools
... • Most species loss can be traced to three major threats: – Habitat destruction – Introduced species – Overexploitation ...
... • Most species loss can be traced to three major threats: – Habitat destruction – Introduced species – Overexploitation ...
Potential for omnivory and apparent intraguild predation in rocky
... ABSTRACT: We assessed the ingestion of animal items by 29 herbivore species of the most common invertebrates on rocky intertidal shores of northern Chile (21 to 30° S). Data were obtained from 4 communities sampled seasonally from winter 2004 to spring 2005. Gastric contents of 2671 individuals were ...
... ABSTRACT: We assessed the ingestion of animal items by 29 herbivore species of the most common invertebrates on rocky intertidal shores of northern Chile (21 to 30° S). Data were obtained from 4 communities sampled seasonally from winter 2004 to spring 2005. Gastric contents of 2671 individuals were ...
a haunting legacy from isoclines: mammal
... competition will vary among habitats, and habitat selection will be a major contributor to coexistence. Competition will vanish to zero (the ghost of competition) when species occupy completely separate habitats. even though the potential for competition remains high. Competitive potential can be es ...
... competition will vary among habitats, and habitat selection will be a major contributor to coexistence. Competition will vanish to zero (the ghost of competition) when species occupy completely separate habitats. even though the potential for competition remains high. Competitive potential can be es ...
Identification of Potential NAtural heritage Sites in Arab Countries
... desertic. from the Atlantic ocean to the Arabian gul( separating the Mediterranean World from Tropical Africa. It is thus the hinge of temperate and tropical environments. and the heart of the Old World. It may be useless to repeat that the Arab World is dominated by the flat desert, but it is usefu ...
... desertic. from the Atlantic ocean to the Arabian gul( separating the Mediterranean World from Tropical Africa. It is thus the hinge of temperate and tropical environments. and the heart of the Old World. It may be useless to repeat that the Arab World is dominated by the flat desert, but it is usefu ...
Terrestrial Arthropod Assemblages: Their Use in Conservation
... 1988). In this discussion, we frequentlycompare terrestrial arthropods and vertebrates-not to insist that terrestrial arthropods universally serve as "better" indicators, but to illustrate circumstances in which their use might be particularly advantageous. Terrestrial arthropods make up 93% of the ...
... 1988). In this discussion, we frequentlycompare terrestrial arthropods and vertebrates-not to insist that terrestrial arthropods universally serve as "better" indicators, but to illustrate circumstances in which their use might be particularly advantageous. Terrestrial arthropods make up 93% of the ...
Population density of North American elk
... capacity (K) based on physical condition of elk on Starkey, which we estimated to be 20.1 elk/km2; and at low densities near or below maximum sustained yield (MSY), which we estimated at 4.1 elk/km2 (Stewart et al. 2006). The high-density population was randomly assigned to the northeast east study ...
... capacity (K) based on physical condition of elk on Starkey, which we estimated to be 20.1 elk/km2; and at low densities near or below maximum sustained yield (MSY), which we estimated at 4.1 elk/km2 (Stewart et al. 2006). The high-density population was randomly assigned to the northeast east study ...
The impact of floral larceny on individuals, populations, and
... the bumblebee-pollinated alpine skypilot, Polemonium viscosum, in the process damaging female parts of flowers and rendering them barren (Galen 1983, 1999). These ants prefer flowers with long, broadly flared corollas. However, such flowers are also chosen more often by bumblebee pollinators. Simila ...
... the bumblebee-pollinated alpine skypilot, Polemonium viscosum, in the process damaging female parts of flowers and rendering them barren (Galen 1983, 1999). These ants prefer flowers with long, broadly flared corollas. However, such flowers are also chosen more often by bumblebee pollinators. Simila ...
Ecology is - El Paso High School
... Not every organism can live everywhere on Earth Abiotic factors determine which organisms can survive where: The Coral Reef is an environment teaming with life, but many organisms would find this environment unsuitable due to its abiotic factors (too much water, temperature, availability of light, e ...
... Not every organism can live everywhere on Earth Abiotic factors determine which organisms can survive where: The Coral Reef is an environment teaming with life, but many organisms would find this environment unsuitable due to its abiotic factors (too much water, temperature, availability of light, e ...
Climate mediates the effects of disturbance on ant assemblage structure
... selected two commonly-used metrics to describe assemblage structure: species richness and a measure of species evenness, the Probability of Interspecific Encounter [PIE, 20, 21]. We calculated PIE from Simpson‟s diversity index (PIE = 1 – Simpson‟s diversity index) using the vegan package [22]. PIE ...
... selected two commonly-used metrics to describe assemblage structure: species richness and a measure of species evenness, the Probability of Interspecific Encounter [PIE, 20, 21]. We calculated PIE from Simpson‟s diversity index (PIE = 1 – Simpson‟s diversity index) using the vegan package [22]. PIE ...
Impact of Alien Plants on Hawaii`s Native Biota
... Agricultural interests accelerated the process even more by bringing in pasture grasses and forb seeds which generally were contaminated with weeds from other sources, a common problem until quite recently (Salisbury 1964). Finally, foresters brought in trees, initially to reforest watershed areas d ...
... Agricultural interests accelerated the process even more by bringing in pasture grasses and forb seeds which generally were contaminated with weeds from other sources, a common problem until quite recently (Salisbury 1964). Finally, foresters brought in trees, initially to reforest watershed areas d ...
Distribution and Reproductive Characteristics of
... main Hawaiian Islands to determine the current distribution of nonindigenous algae and to assess the level of impact that these algal species pose to Hawai'i's marine ecosystems. Maps were generated to examine the spread of these organisms from initial sites of introduction and to assimilate informa ...
... main Hawaiian Islands to determine the current distribution of nonindigenous algae and to assess the level of impact that these algal species pose to Hawai'i's marine ecosystems. Maps were generated to examine the spread of these organisms from initial sites of introduction and to assimilate informa ...
114. Hines, D.E. and Pawlik, J.R. 2012
... a standard curve created using bovine serum albumin (BSA). Replicate analyses for samples collected from 1 to 4 geographically separate sites were conducted for each species. Because predators consume prey volumetrically rather than gravimetrically (Pawlik 2011), conversion factors for dry mass to w ...
... a standard curve created using bovine serum albumin (BSA). Replicate analyses for samples collected from 1 to 4 geographically separate sites were conducted for each species. Because predators consume prey volumetrically rather than gravimetrically (Pawlik 2011), conversion factors for dry mass to w ...
draft cover letter to science
... Africa’s large mammals are dying (1-4), stranded on a continent where wars are being fought over scarce resources (5). With the loss of most large mammals and their commensals, much of North America died c. 13,000 years ago (6-8). More than any other species in the history of life, humans cause ext ...
... Africa’s large mammals are dying (1-4), stranded on a continent where wars are being fought over scarce resources (5). With the loss of most large mammals and their commensals, much of North America died c. 13,000 years ago (6-8). More than any other species in the history of life, humans cause ext ...
Using standardized sampling designs from population ecology to
... Ten plots along each transect were chosen on basis of the occurrence of populations of H. petraea. The distances between the plots were similar in the two countries ranging from 0.3 to 86 km in Germany and from 1 to 106 km in Italy with median values of 29 and 37 km in Germany and Italy, respectivel ...
... Ten plots along each transect were chosen on basis of the occurrence of populations of H. petraea. The distances between the plots were similar in the two countries ranging from 0.3 to 86 km in Germany and from 1 to 106 km in Italy with median values of 29 and 37 km in Germany and Italy, respectivel ...
Competition strength of two significant invasive
... I investigated differences in competitiveness between a primary invader Chrysanthemoides monilifera subsp. rotundata (Asteraceae, hereafter bitou bush) and a secondary exotic scrambler Asparagus aethiopicus (Asparagaceae, hereafter asparagus fern) which is increasing in abundance in native habit ...
... I investigated differences in competitiveness between a primary invader Chrysanthemoides monilifera subsp. rotundata (Asteraceae, hereafter bitou bush) and a secondary exotic scrambler Asparagus aethiopicus (Asparagaceae, hereafter asparagus fern) which is increasing in abundance in native habit ...
Within outlying mean indexes: refining the OMI analysis for
... region and per family) to assess the phylogenetic relatedness between different amphibian families and genera within each geographical region. Mérigoux & Dolédec (2004) performed two OMI analyses on freshwater invertebrates (one per season, spring and autumn) to address seasonal shifts in the hydr ...
... region and per family) to assess the phylogenetic relatedness between different amphibian families and genera within each geographical region. Mérigoux & Dolédec (2004) performed two OMI analyses on freshwater invertebrates (one per season, spring and autumn) to address seasonal shifts in the hydr ...
Rays are the most diverse group of cartilaginous fishes, with
... similar to that of sharks. Rhynchobatids can be distinguished from the rhinobatids due to their more distinct heads and presence of a distinct lower lobe on the caudal fin. Rhinobatids have a head more continuous with their bodies and tend to be more dorsoventrally flattened. Both are benthic and ca ...
... similar to that of sharks. Rhynchobatids can be distinguished from the rhinobatids due to their more distinct heads and presence of a distinct lower lobe on the caudal fin. Rhinobatids have a head more continuous with their bodies and tend to be more dorsoventrally flattened. Both are benthic and ca ...
Abundance and Movements of Terrestrial Salamanders
... salamanders, ensatina and western redback, and the low average distances moved are also expected based on their life histories; the high site-to-site variation in abundance is more difficult to explain. Both the ensatina and western redback salamander are members of the family Plethodontidae, which ...
... salamanders, ensatina and western redback, and the low average distances moved are also expected based on their life histories; the high site-to-site variation in abundance is more difficult to explain. Both the ensatina and western redback salamander are members of the family Plethodontidae, which ...
Distribution and status of native carnivorous land snails in the
... 7.xii.1975) and subfossil in caves at Ruakokoputuna and Waewaepa, northern end of Puketoi Ra. (Dell 1955; Parkinson 1971). Two old but undated specimens in the Auckland Institute and Museum are from near the summit of Kapiti Island (1700 feet; AK 17027). The current status of the species on Kapiti I ...
... 7.xii.1975) and subfossil in caves at Ruakokoputuna and Waewaepa, northern end of Puketoi Ra. (Dell 1955; Parkinson 1971). Two old but undated specimens in the Auckland Institute and Museum are from near the summit of Kapiti Island (1700 feet; AK 17027). The current status of the species on Kapiti I ...
Predicting rates of interspecific interaction from phylogenetic trees
... interactions (Webb et al. 2002; Ives & Godfray 2006; Mouquet et al. 2012; Rafferty & Ives 2013). Put differently, such approaches rely on ‘phylogenetic signal’ in species’ traits – close relatives are more phenotypically similar for key traits than distant ones (Blomberg et al. 2003). However, empir ...
... interactions (Webb et al. 2002; Ives & Godfray 2006; Mouquet et al. 2012; Rafferty & Ives 2013). Put differently, such approaches rely on ‘phylogenetic signal’ in species’ traits – close relatives are more phenotypically similar for key traits than distant ones (Blomberg et al. 2003). However, empir ...
Species indicators of large herbivore density: comparing taxa and
... full factorial design for a total of eight experimental treatments. For all taxa but bees, we tested 54 ...
... full factorial design for a total of eight experimental treatments. For all taxa but bees, we tested 54 ...
Guide to protected species surveys
... Barn owls have undergone a steady decline in numbers in the UK. It is estimated that numbers have dropped from approximately 20,000 pairs in the early 1900s to around 4,000 pairs in the 1990s. The main mortality factors are starvation, which accounts for around 55% of deaths and is most likely due t ...
... Barn owls have undergone a steady decline in numbers in the UK. It is estimated that numbers have dropped from approximately 20,000 pairs in the early 1900s to around 4,000 pairs in the 1990s. The main mortality factors are starvation, which accounts for around 55% of deaths and is most likely due t ...
i.e. Mayfield and Levine 2010
... et al. 2009). This hypothesis has been termed the Ôcompetition-relatedness hypothesisÕ (Cahill et al. 2008). The hypothesis is usually attributed to Darwin (1859), who noted that species of the same genus tend to be more ecologically similar, and should thus compete more severely than species of dis ...
... et al. 2009). This hypothesis has been termed the Ôcompetition-relatedness hypothesisÕ (Cahill et al. 2008). The hypothesis is usually attributed to Darwin (1859), who noted that species of the same genus tend to be more ecologically similar, and should thus compete more severely than species of dis ...
pdf - New Zealand Ecological Society
... when attempting evolutionary rescue, such as loss of genetic diversity due to directional selection (Stockwell et al. 2003). These authors suggest that adaptation could lead to a loss of genetic variation as genotypes that improve fitness increase. Survival of threatened species may therefore mean p ...
... when attempting evolutionary rescue, such as loss of genetic diversity due to directional selection (Stockwell et al. 2003). These authors suggest that adaptation could lead to a loss of genetic variation as genotypes that improve fitness increase. Survival of threatened species may therefore mean p ...
Final Report - The Rufford Foundation
... unwanted consequences, formerly that would be too big to certainly assume that foxes would eat completely during field trials, and would not be accepted later for extended use in protecting foxes against illegal poisoning, the former application of our project. A potential way to consider this cachi ...
... unwanted consequences, formerly that would be too big to certainly assume that foxes would eat completely during field trials, and would not be accepted later for extended use in protecting foxes against illegal poisoning, the former application of our project. A potential way to consider this cachi ...
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.