Do subordinate species punch above their weight? Evidence from
... in order to provide a framework for future studies of biodiversity effects on ecosystem functioning. I synthesize the current state of knowledge about subordinate species and give a clear definition for these species, I provide evidence of their functional role in ecosystems, and I show how the impo ...
... in order to provide a framework for future studies of biodiversity effects on ecosystem functioning. I synthesize the current state of knowledge about subordinate species and give a clear definition for these species, I provide evidence of their functional role in ecosystems, and I show how the impo ...
downloadable pdf - Office of Research
... They range from fingernail-length miniatures to sedanlength monsters. They are among the most diverse and common fishes, comprising one in four freshwater species. Despite nearly three centuries of exploration and research and the recognition of more than 2,700 species, an estimated 1,750 catfish sp ...
... They range from fingernail-length miniatures to sedanlength monsters. They are among the most diverse and common fishes, comprising one in four freshwater species. Despite nearly three centuries of exploration and research and the recognition of more than 2,700 species, an estimated 1,750 catfish sp ...
Is there an influence of historical events on contemporary fish
... continents and that the role of historical factors, at this scale of investigation, had a weak effect, if any. We agreed with Currie’s (1991) suggestion for this ‘oversight’ of historical factors which claims that species richness for terrestrial organisms can be affected by historical factors only ...
... continents and that the role of historical factors, at this scale of investigation, had a weak effect, if any. We agreed with Currie’s (1991) suggestion for this ‘oversight’ of historical factors which claims that species richness for terrestrial organisms can be affected by historical factors only ...
Extension on Evolution
... Although the actual number of interactions that take place among living things on Earth is essentially limitless, ecologists group interactions between species into a few basic categories. These categories reflect whether the outcome of the interactions is positive (+), negative (–), or neutral (0) ...
... Although the actual number of interactions that take place among living things on Earth is essentially limitless, ecologists group interactions between species into a few basic categories. These categories reflect whether the outcome of the interactions is positive (+), negative (–), or neutral (0) ...
Chapter 266 - Global Declines of Amphibians
... and western North America (Stuart et al., 2008). The islands of the Caribbean and Pacific have some of the highest percentages (up to 100%) of endemic species that are threatened or endangered, but have relatively few species. Less is known about the status of species in Africa and Asia. Nonetheless ...
... and western North America (Stuart et al., 2008). The islands of the Caribbean and Pacific have some of the highest percentages (up to 100%) of endemic species that are threatened or endangered, but have relatively few species. Less is known about the status of species in Africa and Asia. Nonetheless ...
Numerical and functional response of feral cats
... 5-mL vials in 75% alcohol. Rat remains were identified largely by the presence of molar and incisor teeth. A minimum number of rats per scat was estimated from the number of molars of the same age class (Karnoukhova 1971) (i.e. four molars [2 upper, 2 lower] of an equivalent degree of wear were rega ...
... 5-mL vials in 75% alcohol. Rat remains were identified largely by the presence of molar and incisor teeth. A minimum number of rats per scat was estimated from the number of molars of the same age class (Karnoukhova 1971) (i.e. four molars [2 upper, 2 lower] of an equivalent degree of wear were rega ...
THE ROLE OF INTRODUCED SPECIES IN THE DEGRADATION OF
... Guam, the largest island of Micronesia [54,100 hectares (ha)], has a remarkable ecological history. In the latter half of the 20th century, Guam lost virtually all its native bird species (36, 62, 73, 81). By early 1998, only three of Guam’s 13 native forest bird populations retained even a slender ...
... Guam, the largest island of Micronesia [54,100 hectares (ha)], has a remarkable ecological history. In the latter half of the 20th century, Guam lost virtually all its native bird species (36, 62, 73, 81). By early 1998, only three of Guam’s 13 native forest bird populations retained even a slender ...
Learn More - Garden Africa
... based on the experiences of all those that have attended both the Brazil and Tanzania workshop. It is important to note that this Learning comes directly from host country staffs who have all worked on Darwin Initiative funded projects – from the horse’s mouth one might say. The note is not intended ...
... based on the experiences of all those that have attended both the Brazil and Tanzania workshop. It is important to note that this Learning comes directly from host country staffs who have all worked on Darwin Initiative funded projects – from the horse’s mouth one might say. The note is not intended ...
Evolutionary food web model based on body masses gives realistic
... the niche model [2] or the cascade model [3]. A more recent approach is to use the empirically found allometries of body size and foraging behaviour of individual consumers to predict the links between species on a more biological basis [4]. However, real food webs are not produced by a generative a ...
... the niche model [2] or the cascade model [3]. A more recent approach is to use the empirically found allometries of body size and foraging behaviour of individual consumers to predict the links between species on a more biological basis [4]. However, real food webs are not produced by a generative a ...
Gough and Grace 1999
... and Armbruster 1991, Mitchell 1992). Using this method, Grace and Pugesek (1997) proposed both a general model whereby plant species density is controlled by abiotic conditions, disturbance, and plant biomass, and a specific version of the model for a Louisiana coastal wetland. They concluded that c ...
... and Armbruster 1991, Mitchell 1992). Using this method, Grace and Pugesek (1997) proposed both a general model whereby plant species density is controlled by abiotic conditions, disturbance, and plant biomass, and a specific version of the model for a Louisiana coastal wetland. They concluded that c ...
Alpine Arthropod Diversity
... relatives, commonly refered to as melanism. There are several examples of this. One such example is alpine butterflies of the genus Parnassius in the Himalayans. They have been shown to have strikingly darker wing markings at 3500 m or higher than at lower altitudes (Mani, 1968). There can be a numb ...
... relatives, commonly refered to as melanism. There are several examples of this. One such example is alpine butterflies of the genus Parnassius in the Himalayans. They have been shown to have strikingly darker wing markings at 3500 m or higher than at lower altitudes (Mani, 1968). There can be a numb ...
- reptile conservation
... tree canopies by juveniles during inactive periods could be an evolved behavior for avoiding predators. Vertical structure use is likely advantageous for avoiding native daytime predators such as Puerto Rican Racers (Borikenophis [formerly Alsophis] portoricensis; LeVering and Perry 2003), as well a ...
... tree canopies by juveniles during inactive periods could be an evolved behavior for avoiding predators. Vertical structure use is likely advantageous for avoiding native daytime predators such as Puerto Rican Racers (Borikenophis [formerly Alsophis] portoricensis; LeVering and Perry 2003), as well a ...
Biodiversity: Structure and Function
... Today invasive species form a significant component of global change, in particular in anthropogenically modified ecosystems. Invasive species have a severe economic impact and the costs of these species are estimated to reach billions of US dollars annually. Global biodiversity is still rich, thoug ...
... Today invasive species form a significant component of global change, in particular in anthropogenically modified ecosystems. Invasive species have a severe economic impact and the costs of these species are estimated to reach billions of US dollars annually. Global biodiversity is still rich, thoug ...
The Ecological Role of the Mammalian Mesocarnivore
... (Estes et al. 1998). On the 544-square-kilometer Isle Royale, Michigan, the ecological effects of wolves were caused by just two or three packs (McLaren and Peterson 1994). Thus, it is clear that a relatively small number of large carnivores can directly or indirectly influence multiple trophic leve ...
... (Estes et al. 1998). On the 544-square-kilometer Isle Royale, Michigan, the ecological effects of wolves were caused by just two or three packs (McLaren and Peterson 1994). Thus, it is clear that a relatively small number of large carnivores can directly or indirectly influence multiple trophic leve ...
eports - WSU Entomology - Washington State University
... food preferences, species can be ‘‘trained’’ to use the same or different resources (Finke and Snyder 2008). Another possibility exists when species differ in where they forage in the environment, such that each species can only access resources available in the habitat it frequents. Here, habitat c ...
... food preferences, species can be ‘‘trained’’ to use the same or different resources (Finke and Snyder 2008). Another possibility exists when species differ in where they forage in the environment, such that each species can only access resources available in the habitat it frequents. Here, habitat c ...
The Ecological Role of the Mammalian Mesocarnivore
... (Estes et al. 1998). On the 544-square-kilometer Isle Royale, Michigan, the ecological effects of wolves were caused by just two or three packs (McLaren and Peterson 1994). Thus, it is clear that a relatively small number of large carnivores can directly or indirectly influence multiple trophic leve ...
... (Estes et al. 1998). On the 544-square-kilometer Isle Royale, Michigan, the ecological effects of wolves were caused by just two or three packs (McLaren and Peterson 1994). Thus, it is clear that a relatively small number of large carnivores can directly or indirectly influence multiple trophic leve ...
inglês - Biota Neotropica
... being mainly insectivorous in certain habitats (Uieda et al. 1997), or zooplanktophagous (Arcifa et al. 1991). Characidium aff. zebra was insectivorous-benthophagous, feeding mainly on autoctones insects, mites, and crustaceans. At the State Park of Morro do Diabo, State ...
... being mainly insectivorous in certain habitats (Uieda et al. 1997), or zooplanktophagous (Arcifa et al. 1991). Characidium aff. zebra was insectivorous-benthophagous, feeding mainly on autoctones insects, mites, and crustaceans. At the State Park of Morro do Diabo, State ...
Bat research and management in San Diego County
... • Locate other target bat species habitat use areas (drinking sources, foraging grounds, night roosts, etc.). • Determine home range and seasonal variation of individuals within target species. • Limitations• Tracking access may be difficult in a multijurisdictional landscape (including private land ...
... • Locate other target bat species habitat use areas (drinking sources, foraging grounds, night roosts, etc.). • Determine home range and seasonal variation of individuals within target species. • Limitations• Tracking access may be difficult in a multijurisdictional landscape (including private land ...
APES Fall Semester Peer Review
... 65. Certain night-active moths and day-active birds are specialized nectar feeders. How do these species coexist if they are using the same resource for food? A) Since they both use the nectar eventually one of the two species will need to move to a new area. B) They do not compete for the nectar be ...
... 65. Certain night-active moths and day-active birds are specialized nectar feeders. How do these species coexist if they are using the same resource for food? A) Since they both use the nectar eventually one of the two species will need to move to a new area. B) They do not compete for the nectar be ...
Wildlife Booklet.indd
... and the introduction of domestic stock, Rabbits and nonnative predators (Foxes and Cats). These activities have had major impacts in some areas, less in others (see Table 1). For example, the extensive vegetation remaining on public land in the region is not representative of all the different types ...
... and the introduction of domestic stock, Rabbits and nonnative predators (Foxes and Cats). These activities have had major impacts in some areas, less in others (see Table 1). For example, the extensive vegetation remaining on public land in the region is not representative of all the different types ...
Biodiversity and Plant-Animal Coevolution
... means without prior written permission of the publisher. B I O D I V E R S I T Y A N D P L A N T- A N I M A L C O E VO L U T I O N ...
... means without prior written permission of the publisher. B I O D I V E R S I T Y A N D P L A N T- A N I M A L C O E VO L U T I O N ...
Rutgers Model United Nations 4 - Institute for Domestic and
... humans; however, human influence continually disturbs natural biodiversity at an increasing rate. In 1992, one hundred and fifty states signed the Convention on Biological Diversity, in order to have a global agreement on the conservation and sustainable use of biological diversity. The treaty’s thr ...
... humans; however, human influence continually disturbs natural biodiversity at an increasing rate. In 1992, one hundred and fifty states signed the Convention on Biological Diversity, in order to have a global agreement on the conservation and sustainable use of biological diversity. The treaty’s thr ...
Island restoration
The ecological restoration of islands, or island restoration, is the application of the principles of ecological restoration to islands and island groups. Islands, due to their isolation, are home to many of the world's endemic species, as well as important breeding grounds for seabirds and some marine mammals. Their ecosystems are also very vulnerable to human disturbance and particularly to introduced species, due to their small size. Island groups such as New Zealand and Hawaii have undergone substantial extinctions and losses of habitat. Since the 1950s several organisations and government agencies around the world have worked to restore islands to their original states; New Zealand has used them to hold natural populations of species that would otherwise be unable to survive in the wild. The principal components of island restoration are the removal of introduced species and the reintroduction of native species.