Plant Biodiversity in the Semi-arid Zone of Tunisia
... suggested that plant communities with high species diversity combat desertification process. However there is not enough information about arid and semi-arid land ecosystem in North Africa. It is necessary to measure the plant community structure in detail to know the basis of the ecosystem in the a ...
... suggested that plant communities with high species diversity combat desertification process. However there is not enough information about arid and semi-arid land ecosystem in North Africa. It is necessary to measure the plant community structure in detail to know the basis of the ecosystem in the a ...
The beta-diversity of species interactions: Untangling the drivers of
... beta-diversity, the vast majority of theoretical and empirical studies have focused on patterns of beta-diversity within single trophic levels. Concurrently, there has been a surge of interest in using species-interaction networks to understand how ecological and evolutionary processes shape communi ...
... beta-diversity, the vast majority of theoretical and empirical studies have focused on patterns of beta-diversity within single trophic levels. Concurrently, there has been a surge of interest in using species-interaction networks to understand how ecological and evolutionary processes shape communi ...
Change over Time
... certain point, it may not be able to recover One way that this can happen is if a species becomes isolated, cut off geographically from others of its species Another way is habitat loss, when land area available for a species to live decreases due to human activity ...
... certain point, it may not be able to recover One way that this can happen is if a species becomes isolated, cut off geographically from others of its species Another way is habitat loss, when land area available for a species to live decreases due to human activity ...
AP Environmental Science
... * Lab: Monitoring Air Quality: Students will measure environmental quality of the atmosphere and the resulting consequences for the environment. * Video: Race to Save the Planet: Only One Atmosphere ...
... * Lab: Monitoring Air Quality: Students will measure environmental quality of the atmosphere and the resulting consequences for the environment. * Video: Race to Save the Planet: Only One Atmosphere ...
JAR.BOB.6-4 - Marine Conservation Biology Institute
... “We’ve always treated the ocean like a frontier, as if its marine waters. The researchers documented natural interactions resources were infinite and free to plunder. And several cenamong some 250 birds, fish, and invertebrates that fly above, swim turies ago, that may effectively have been true,” s ...
... “We’ve always treated the ocean like a frontier, as if its marine waters. The researchers documented natural interactions resources were infinite and free to plunder. And several cenamong some 250 birds, fish, and invertebrates that fly above, swim turies ago, that may effectively have been true,” s ...
Applied and Directed Studies Science Program
... • Determine fish community composition • Will monitor a sentinel fish species for health (condition, growth, reproduction) and survival. ...
... • Determine fish community composition • Will monitor a sentinel fish species for health (condition, growth, reproduction) and survival. ...
Intertidal Zonation Does Species Diversity
... few tolerant species dominated the higher zone whereas a number of species were more evenly represented in the lower zones. Increased competition for space, predation and disturbance by waves is thought to contribute to fewer individuals per species in the low zone. While the Shannon-Wiener Index an ...
... few tolerant species dominated the higher zone whereas a number of species were more evenly represented in the lower zones. Increased competition for space, predation and disturbance by waves is thought to contribute to fewer individuals per species in the low zone. While the Shannon-Wiener Index an ...
Outline - EDHSGreenSea.net
... A. Ecology is the study of connections in the natural world. Ecologists try to understand interactions among organisms, populations, communities, ecosystems and the biosphere. 1. An organism is any form of life. The cell is the basic unit of life in organisms. 2. Organisms are classified as either e ...
... A. Ecology is the study of connections in the natural world. Ecologists try to understand interactions among organisms, populations, communities, ecosystems and the biosphere. 1. An organism is any form of life. The cell is the basic unit of life in organisms. 2. Organisms are classified as either e ...
Malay Civet Population Project
... costs are high: Lindström 1986) and the “anti-kleptogamy” hypothesis (males space themselves to monopolise as many females as possible, defending these territories to ensure exclusive access to several females: Roper at al. 1986). Understanding the ecological conditions that allow multiple stable te ...
... costs are high: Lindström 1986) and the “anti-kleptogamy” hypothesis (males space themselves to monopolise as many females as possible, defending these territories to ensure exclusive access to several females: Roper at al. 1986). Understanding the ecological conditions that allow multiple stable te ...
The Evolution of Human Ecological Systems During the Period of
... choose what constitutes a resource, and how they use those resources. The relationship between resource definition and use and knowledge, information ecology, the longue durée, and social organization is much more complex than represented in Figure 1. I have chosen to place resource definition and u ...
... choose what constitutes a resource, and how they use those resources. The relationship between resource definition and use and knowledge, information ecology, the longue durée, and social organization is much more complex than represented in Figure 1. I have chosen to place resource definition and u ...
Nesting songbirds assess spatial heterogeneity of predatory
... located in Dutchess County, Millbrook, New York, USA. In spring 2006, we established 32 experimental plots: 16 broadcasting chipmunk vocalizations and 16 silent control plots. Each playback plot consisted of three CD ⁄ speaker stations (T100-CD Trutech, USA; 401441 speakers; Radio Shack, Fort Worth, ...
... located in Dutchess County, Millbrook, New York, USA. In spring 2006, we established 32 experimental plots: 16 broadcasting chipmunk vocalizations and 16 silent control plots. Each playback plot consisted of three CD ⁄ speaker stations (T100-CD Trutech, USA; 401441 speakers; Radio Shack, Fort Worth, ...
BIODIVERSITYENDANGEREDSPECIESANIMALBEHAVIOR_updates
... • Locate visitor parking outside parks and use shuttle buses for entering and touring heavily used parks • Increase funds for park maintenance and repairs • Survey wildlife in parks • Raise entry fees for visitors and use funds for park management and maintenance • Limit the number of visitors to cr ...
... • Locate visitor parking outside parks and use shuttle buses for entering and touring heavily used parks • Increase funds for park maintenance and repairs • Survey wildlife in parks • Raise entry fees for visitors and use funds for park management and maintenance • Limit the number of visitors to cr ...
Environmental warming alters food
... temperature increase over the next 100 years9, so our warming treatment scales reasonably with rates of temperature change that long-lived organisms might experience. Responses of short-lived microorganisms also re¯ect long-term dynamics rather than transient consequences of initial conditions6,10,1 ...
... temperature increase over the next 100 years9, so our warming treatment scales reasonably with rates of temperature change that long-lived organisms might experience. Responses of short-lived microorganisms also re¯ect long-term dynamics rather than transient consequences of initial conditions6,10,1 ...
The prevailing paradigm of ecosystems is as a complex community
... dramatic “resurgent” outbreaks that characterized rice production in Asia during the 1970s and 1980s. Of a different nature, but also important are landscape-level vegetation and water patterns. Traditional small-scale “patchwork” plantings, where rice is grown most of the year in a non-synchronous ...
... dramatic “resurgent” outbreaks that characterized rice production in Asia during the 1970s and 1980s. Of a different nature, but also important are landscape-level vegetation and water patterns. Traditional small-scale “patchwork” plantings, where rice is grown most of the year in a non-synchronous ...
Coupled Logistic Map for Symbiotic Relations
... A logistic map which describes the population dynamics of a species would be the most famous nonlinear difference equation. The map would have dual significance as an instructive example of the nonlinear dynamics and as an ecological model [1]. In spite of its simple form, it could show us the essen ...
... A logistic map which describes the population dynamics of a species would be the most famous nonlinear difference equation. The map would have dual significance as an instructive example of the nonlinear dynamics and as an ecological model [1]. In spite of its simple form, it could show us the essen ...
Texas Ecosystems - Longview Independent School District
... What predators does this animal face in your ecosystem? How will it affect the ecosystem? Insert a picture and record your information with a microphone ...
... What predators does this animal face in your ecosystem? How will it affect the ecosystem? Insert a picture and record your information with a microphone ...
13.1 Ecologists Study Relationships
... 13.1 Ecologists Study Relationships • Carbon is the building block of life. – The carbon cycle moves carbon from the atmosphere, through the food web, and returns to the atmosphere. – Carbon is emitted by the burning of fossil fuels. – Some carbon is stored for long periods of time in areas called ...
... 13.1 Ecologists Study Relationships • Carbon is the building block of life. – The carbon cycle moves carbon from the atmosphere, through the food web, and returns to the atmosphere. – Carbon is emitted by the burning of fossil fuels. – Some carbon is stored for long periods of time in areas called ...
Mid-term #1
... invasion. Using those stages, they then ascribe different statuses to alien species such as alien plant, casual alien plant, naturalized plant, invasive plants, and transformers depending on which barriers they have surmounted. First explain the introduction, naturalization and invasion stages. Next ...
... invasion. Using those stages, they then ascribe different statuses to alien species such as alien plant, casual alien plant, naturalized plant, invasive plants, and transformers depending on which barriers they have surmounted. First explain the introduction, naturalization and invasion stages. Next ...
Brief report Bright colours and predation risk in passerines
... (Lack 1951). In the formula (1- s) is the proportional mortality index, N is the total number of birds preyed on and Y, x dx is the sum of preyed on (dx) individuals of each species during their x-th calendar year . The sum of each year is weighted by the number of years the bird survived . We analy ...
... (Lack 1951). In the formula (1- s) is the proportional mortality index, N is the total number of birds preyed on and Y, x dx is the sum of preyed on (dx) individuals of each species during their x-th calendar year . The sum of each year is weighted by the number of years the bird survived . We analy ...
Species Coexistence and Pathogens with
... Interspecific transmission rates (b12, b21) were varied independently, over a range from 0.01 to 0.5, in 0.01 intervals. For simplicity, we assume that both hosts contribute equally to the total host population and that population carrying capacity of the two populations are equal and independent. E ...
... Interspecific transmission rates (b12, b21) were varied independently, over a range from 0.01 to 0.5, in 0.01 intervals. For simplicity, we assume that both hosts contribute equally to the total host population and that population carrying capacity of the two populations are equal and independent. E ...
Green Generation Power Point
... • It causes phytoplankton to grow and reproduce more rapidly, resulting in algal blooms. • This bloom of algae disrupts normal ecosystem functioning and causes many problems. • The algae may use up all the oxygen in the water, leaving none for other marine life. This results in the death of many aqu ...
... • It causes phytoplankton to grow and reproduce more rapidly, resulting in algal blooms. • This bloom of algae disrupts normal ecosystem functioning and causes many problems. • The algae may use up all the oxygen in the water, leaving none for other marine life. This results in the death of many aqu ...
well described by the Phytoplankton Ecology Group
... PEG 6. Herbivorous zooplanktonic species become food-limited and both their body weight per unit length and their fecundity declines. This results in a decrease in their population densities and biomasses. ...
... PEG 6. Herbivorous zooplanktonic species become food-limited and both their body weight per unit length and their fecundity declines. This results in a decrease in their population densities and biomasses. ...
Theoretical ecology
Theoretical ecology is the scientific discipline devoted to the study of ecological systems using theoretical methods such as simple conceptual models, mathematical models, computational simulations, and advanced data analysis. Effective models improve understanding of the natural world by revealing how the dynamics of species populations are often based on fundamental biological conditions and processes. Further, the field aims to unify a diverse range of empirical observations by assuming that common, mechanistic processes generate observable phenomena across species and ecological environments. Based on biologically realistic assumptions, theoretical ecologists are able to uncover novel, non-intuitive insights about natural processes. Theoretical results are often verified by empirical and observational studies, revealing the power of theoretical methods in both predicting and understanding the noisy, diverse biological world.The field is broad and includes foundations in applied mathematics, computer science, biology, statistical physics, genetics, chemistry, evolution, and conservation biology. Theoretical ecology aims to explain a diverse range of phenomena in the life sciences, such as population growth and dynamics, fisheries, competition, evolutionary theory, epidemiology, animal behavior and group dynamics, food webs, ecosystems, spatial ecology, and the effects of climate change.Theoretical ecology has further benefited from the advent of fast computing power, allowing the analysis and visualization of large-scale computational simulations of ecological phenomena. Importantly, these modern tools provide quantitative predictions about the effects of human induced environmental change on a diverse variety of ecological phenomena, such as: species invasions, climate change, the effect of fishing and hunting on food network stability, and the global carbon cycle.