Penhill`s Natural Vegetation
... (Vegetation Type 62, Low & Rebelo 1996)where the soils are granitic. To the north of Penhill are farmlands. Another remnant of Sand Plain Fynbos lies north-west to west of Penhill (approximately 33o59’23.94”S; 18o43’51.65”E). This essay concerns the Sand Plain Fynbos remnants. The Sand Plain Fynbos ...
... (Vegetation Type 62, Low & Rebelo 1996)where the soils are granitic. To the north of Penhill are farmlands. Another remnant of Sand Plain Fynbos lies north-west to west of Penhill (approximately 33o59’23.94”S; 18o43’51.65”E). This essay concerns the Sand Plain Fynbos remnants. The Sand Plain Fynbos ...
Unit: BIODIVERSITY (Reading material exclusively for students of
... following the introduction of alien species to new ecosystems, whether deliberately or accidentally. The third, and by far the most important, mode of human-driven extinction is the destruction and fragmentation of habitat, especially the inexorable cutting of tropical rainforests. The forests, whic ...
... following the introduction of alien species to new ecosystems, whether deliberately or accidentally. The third, and by far the most important, mode of human-driven extinction is the destruction and fragmentation of habitat, especially the inexorable cutting of tropical rainforests. The forests, whic ...
Managing open habitats in upland forests
... Committee) website at http://jncc.defra.gov.uk. Some regional biodiversity groups and nature partnerships include other locally important habitats that are not on the national lists. Their local status should also be considered when deciding priorities for action. The size of an area of open habitat ...
... Committee) website at http://jncc.defra.gov.uk. Some regional biodiversity groups and nature partnerships include other locally important habitats that are not on the national lists. Their local status should also be considered when deciding priorities for action. The size of an area of open habitat ...
Dyeing Poison Dart Frog
... • The dyeing poison dart frog is one of the hardier poison frogs and also one of the largest and most brightly colored. It is closely related to the blue poison dart frog and has been hybridized (bred with another species). D. tinctorius should be easily distinguished by its yellow stripes or stripe ...
... • The dyeing poison dart frog is one of the hardier poison frogs and also one of the largest and most brightly colored. It is closely related to the blue poison dart frog and has been hybridized (bred with another species). D. tinctorius should be easily distinguished by its yellow stripes or stripe ...
3 - Current Forest Conditions and Trends 3.1 - Introduction
... other factors that affects a species or ecosystem, typically by altering a disturbance regime) and ‘combined impacts’ (where changes in climatic variables cause complex interactions between factors that are already threats to the species or ecosystem). Potential Direct Impacts: • Increased temperatu ...
... other factors that affects a species or ecosystem, typically by altering a disturbance regime) and ‘combined impacts’ (where changes in climatic variables cause complex interactions between factors that are already threats to the species or ecosystem). Potential Direct Impacts: • Increased temperatu ...
biology 412: phytogeography
... disciplines of ecology, evolution and conservation.” –Robert J. Whittaker & Dov. F. Sax. 2003 ...
... disciplines of ecology, evolution and conservation.” –Robert J. Whittaker & Dov. F. Sax. 2003 ...
Critical Patch Sizes and Stability in Reaction-Diffusion Equations Norman Cao May 14, 2014
... The Dirichlet condition can be interpreted as forcibly maintaining the population density at the boundary to be a certain value, either by killing or introducing individuals as necessary. The Neumann condition can be interpreted as forcibly maintaining a certain population flux into or out of the do ...
... The Dirichlet condition can be interpreted as forcibly maintaining the population density at the boundary to be a certain value, either by killing or introducing individuals as necessary. The Neumann condition can be interpreted as forcibly maintaining a certain population flux into or out of the do ...
Modelling Herbivore grazing resources using hyperspectral
... There is generally a strong positive correlation between leaf nitrogen concentration and photosynthesis (as long as other factors such as water availability or light are not limiting) (Field and Mooney 1986). Of the nitrogen found in a leaf, a large fraction (over 50%) is contained in the carbonfixi ...
... There is generally a strong positive correlation between leaf nitrogen concentration and photosynthesis (as long as other factors such as water availability or light are not limiting) (Field and Mooney 1986). Of the nitrogen found in a leaf, a large fraction (over 50%) is contained in the carbonfixi ...
THE EcosysTEm 2 Structure 2.1
... A community is a group of populations living and interacting with each other in a common habitat. This contrasts with the term ‘population’ which refers to just one species. The grasslands of Africa contain wildebeest, lions, hyenas, g ...
... A community is a group of populations living and interacting with each other in a common habitat. This contrasts with the term ‘population’ which refers to just one species. The grasslands of Africa contain wildebeest, lions, hyenas, g ...
The assembly of forest communities according to maximum species
... An ongoing debate in ecology concerns the relative importance of competition in driving community patterns, especially along gradients of disturbance and productivity. We used a null model to address this question by testing for non-random organization of forest species according to maximum height, ...
... An ongoing debate in ecology concerns the relative importance of competition in driving community patterns, especially along gradients of disturbance and productivity. We used a null model to address this question by testing for non-random organization of forest species according to maximum height, ...
The importance of coarse woody debris for bryophyte vegetation of
... facultatively (epiphytes, epigeic and epilithic species). For example, 11% of the Hungarian bryoflora (62 species) occur mainly on dead wood (based on Orbán and Vajda 1985), and in a small region in Romania (Ariesului mic basin) 106 species were described from this substrate (Goia and Schumacher 200 ...
... facultatively (epiphytes, epigeic and epilithic species). For example, 11% of the Hungarian bryoflora (62 species) occur mainly on dead wood (based on Orbán and Vajda 1985), and in a small region in Romania (Ariesului mic basin) 106 species were described from this substrate (Goia and Schumacher 200 ...
Abundance and Movements of Terrestrial Salamanders
... and between seasons to determine if stream proximity affected the salamanders’ spatial distribution (Figs. 5a–d). Within seasons, the northwestern salamander was captured significantly more often at 30 m from the stream during both the fall (χ 2 = 7.52, P < 0.02) and winter (χ 2 = 9.08, P < 0.01) th ...
... and between seasons to determine if stream proximity affected the salamanders’ spatial distribution (Figs. 5a–d). Within seasons, the northwestern salamander was captured significantly more often at 30 m from the stream during both the fall (χ 2 = 7.52, P < 0.02) and winter (χ 2 = 9.08, P < 0.01) th ...
Critique of herbivore-driven “rewilding” - Self
... role of free-ranging livestock in the conservation of biodiversity” “The evidence about more recent (ca. 500– 1900 A.D.) periods in Grazing Ecology and Forest History does not support the Vera Hypothesis. The most important general problem is that the material Vera presented appears to be irrelevant ...
... role of free-ranging livestock in the conservation of biodiversity” “The evidence about more recent (ca. 500– 1900 A.D.) periods in Grazing Ecology and Forest History does not support the Vera Hypothesis. The most important general problem is that the material Vera presented appears to be irrelevant ...
Biome Adventure Travel
... Students will be assigned one of the following biomes: taiga (coniferous forest), tundra, deciduous forest, desert, tropical rainforest, grassland, freshwater, and marine. Your first task will be to research information on two cities in your biome. All locations must be located within your biome. Yo ...
... Students will be assigned one of the following biomes: taiga (coniferous forest), tundra, deciduous forest, desert, tropical rainforest, grassland, freshwater, and marine. Your first task will be to research information on two cities in your biome. All locations must be located within your biome. Yo ...
Wildlife Ecology
... Interior to constitute a pest whose protection under this part would present an overwhelming and overriding risk to humans. ...
... Interior to constitute a pest whose protection under this part would present an overwhelming and overriding risk to humans. ...
Status, Basic Ecology and Conservation of Capercaillie
... apparently discrete groups of birds using separate blocks are linked with nearby groups through emigration and immigration, forming what are called metapopulations. In capercaillie, hens tend to disperse further than cocks. Studies on radio-tagged birds in Deeside showed that the average natal dispe ...
... apparently discrete groups of birds using separate blocks are linked with nearby groups through emigration and immigration, forming what are called metapopulations. In capercaillie, hens tend to disperse further than cocks. Studies on radio-tagged birds in Deeside showed that the average natal dispe ...
animal behavior and conservation biology
... the behavior of a population necessarily encompassed the sum of the behavior of individuals within that population. Two exceptions were zoo managers, who recognized that individual behavioral idiosyncrasies could influence breeding success in very small captive populations, and those in charge of re ...
... the behavior of a population necessarily encompassed the sum of the behavior of individuals within that population. Two exceptions were zoo managers, who recognized that individual behavioral idiosyncrasies could influence breeding success in very small captive populations, and those in charge of re ...
Biotic and Abiotic Influences on Ecosystems
... Biotic and Abiotic Influences on Ecosystems (textbook section 2.7) ...
... Biotic and Abiotic Influences on Ecosystems (textbook section 2.7) ...
Ecosystem - Google Groups
... The grass land ecosystem occupies 19% of earth surfaces. The grass land biome occur in regions , where the climate is cool to cold during winters and in summers. It has also two ecosystem: (1) Abiotic ecosystem these include nutrients present in soil and atmosphere. Thus elements like C,H,O,N etc. ...
... The grass land ecosystem occupies 19% of earth surfaces. The grass land biome occur in regions , where the climate is cool to cold during winters and in summers. It has also two ecosystem: (1) Abiotic ecosystem these include nutrients present in soil and atmosphere. Thus elements like C,H,O,N etc. ...
1.-Biodiversity - Lesmahagow High School
... Any three from ….. Tundra, Taiga, temperate deciduous forest, tropical savannah, temperate grassland, desert, Mediterranean, tropical rainforest. ...
... Any three from ….. Tundra, Taiga, temperate deciduous forest, tropical savannah, temperate grassland, desert, Mediterranean, tropical rainforest. ...
Ecological restoration at Mainland Islands in New Zealand
... Forty-nine percent of New Zealand's non-marine endemic birds are extinct (Bell, 1991), while most seabirds are now locally extinct on the New Zealand mainland. The high number of bird extinctions led Diamond (1984) to comment that ``New Zealand no longer has an avifauna, just the wreckage of one.'' ...
... Forty-nine percent of New Zealand's non-marine endemic birds are extinct (Bell, 1991), while most seabirds are now locally extinct on the New Zealand mainland. The high number of bird extinctions led Diamond (1984) to comment that ``New Zealand no longer has an avifauna, just the wreckage of one.'' ...
Our Biodiverse City - eThekwini Municipality
... critical goods such as food, medicines and building materials, and services like flood control and water supply. We do not realise the extent of the damage that will be done to people, infrastructure and the economy if these behaviours continue. The United Nations Millennium Ecosystem Assessment was ...
... critical goods such as food, medicines and building materials, and services like flood control and water supply. We do not realise the extent of the damage that will be done to people, infrastructure and the economy if these behaviours continue. The United Nations Millennium Ecosystem Assessment was ...
WHY LINK SPECIES AND ECOSYSTEMS?
... nutrient retention and energy flow. Biotic interactions such as the replacement of nonfixers by fixers, competition for N between producers and decomposers, and grazing are at the heart of changes in system state. But this static view does not consider the influence of disturbances (floods and dryin ...
... nutrient retention and energy flow. Biotic interactions such as the replacement of nonfixers by fixers, competition for N between producers and decomposers, and grazing are at the heart of changes in system state. But this static view does not consider the influence of disturbances (floods and dryin ...
Living in a landscape of fear: the impact of predation, resource
... Perrin, 1990). Like vervet monkeys, samango monkeys have acoustically distinct alarm calls for different predator guilds which can be differentiated by human observers (Brown, 1989; Papworth, Bose, Barker, Schel, & Zuberbuhler, 2008). Research was conducted at the Lajuma Research Centre, located in ...
... Perrin, 1990). Like vervet monkeys, samango monkeys have acoustically distinct alarm calls for different predator guilds which can be differentiated by human observers (Brown, 1989; Papworth, Bose, Barker, Schel, & Zuberbuhler, 2008). Research was conducted at the Lajuma Research Centre, located in ...
Biodiversity Loss Threatens Human Well-Being
... independently from human valuation, and their magnitude and rate can be established regardless of the cultural, economic, and social values and interests of different human groups (Figure 1, Ecosystem Processes box). Ecosystem services are the benefits provided by ecosystems that contribute to making ...
... independently from human valuation, and their magnitude and rate can be established regardless of the cultural, economic, and social values and interests of different human groups (Figure 1, Ecosystem Processes box). Ecosystem services are the benefits provided by ecosystems that contribute to making ...
Biological Dynamics of Forest Fragments Project
The Biological Dynamics of Forest Fragments Project, originally called the Minimum Critical Size of Ecosystems Project is a large-scale ecological experiment looking at the effects of habitat fragmentation on tropical rainforest; it is one of the most expensive biology experiments ever run. The experiment, which was established in 1979 is located near Manaus, in the Brazilian Amazon. The project is jointly managed by the Smithsonian Institution and INPA, the Brazilian Institute for Research in the Amazon.The project was initiated in 1979 by Thomas Lovejoy to investigate the SLOSS debate. Initially named the Minimum Critical Size of Ecosystems Project, the project created forest fragments of sizes 1 hectare (2 acres), 10 hectares (25 acres), and 100 hectares (247 acres). Data were collected prior to the creation of the fragments and studies of the effects of fragmentation now exceed 25 years.As of October 2010 562 publications and 143 graduate dissertations and theses had emerged from the project.