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Biology 2 Semester Review
Biology 2 Semester Review

- Botanical Society of South Africa
- Botanical Society of South Africa

... Concept of the biosphere. Interconnectedness of components of global ecosystems Biomes Terrestrial and aquatic biomes of southern Africa: describe in terms of climate, soils and vegetation Ecosystems Theoretical understanding of ecosystems Abiotic and biotic factors: effects on community structure a ...
FNHTB Inc (0473, FS0015 and FS0016)
FNHTB Inc (0473, FS0015 and FS0016)

... Carpenter 2002). Indeed, they are complex adaptive systems in which the dynamics of interactions at small scales percolate up to shape macroscopic system dynamics, which then feed back to influence the smaller scales (Levin 1998,2003). It is crucial, then, to understand the linkages among these scal ...
Zoo Powerpoint - ISSH Learners
Zoo Powerpoint - ISSH Learners

... Ecosystems and Habitats • A polar bear survives in the Arctic where it’s cold and wet. An alligator will live where it’s very hot and wet. • Animals live in all kinds of climates but not all animals can live everywhere. • A polar bear can survive where alligators live. Can an alligator survive in t ...
Ecosystem Health of Large Lakes - Great Lakes Fishery Commission
Ecosystem Health of Large Lakes - Great Lakes Fishery Commission

... processes and species abundances within “historical” or normal range that allows the system to be sustainable over time. Ecosystem health for Callicott is not necessarily dependent on persistence of individual species or even maintaining biodiversity, nor does it require maintenance of some referen ...
Natural Sciences Tripos, PART IB ECOLOGY
Natural Sciences Tripos, PART IB ECOLOGY

... respond to these in both the short- and long-term by modification of both their morphology, physiology and biochemistry. In this course, we will examine the responses of plants to changes in a range of abiotic components, such as inorganic ions (e.g. low phosphate, high salinity), water and light, a ...
Conference Abstract template - 12th Pacific Science Inter
Conference Abstract template - 12th Pacific Science Inter

... development, land clearing, erosion of soil, nutrient inputs to coastal waters, and overharvesting of marine resources. Implementing EbA in the Pacific requires effective governance regimes and policy instruments, it must also be econimically efficient. EbA must also move beyond traditional biodiver ...
University of Phoenix Sci256 Week 2 Ecosystems and Populations
University of Phoenix Sci256 Week 2 Ecosystems and Populations

... higher trophic levels because each individual in a higher trophic level must eat many individuals of a lower trophic level to survive. Although the energy acquired by eating those organisms from a lower trophic level is used, the toxic compounds may remain (Especially true for compounds that are sto ...
Chapter 35:
Chapter 35:

... or forest fire. What are PIONEER organisms? ...
Soil Erosion - University of Connecticut
Soil Erosion - University of Connecticut

... 1. Soil erosion is the process of weathering and transport of solids (sediment, soil, rock and other particles) in the natural environment or their source and deposits them elsewhere. 2. Soil erosion usually occurs due to transport by wind, water, or ice; by down-slope creeping of soil and other mat ...
Role of fungi in forests If all the fungi were removed from our Pacific
Role of fungi in forests If all the fungi were removed from our Pacific

... soon be buried in litter and debris. They are particularly important in litter decomposition, nutrient cycling and energy flows in woody ecosystems, and are dominant carbon and organic nutrient recyclers of forest debris. Fungi are particularly valuable in acid soils, where the low pH makes it diffi ...
Cunningham et al
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... Shows that the ratio of above- to below-ground tissue is constant across a wide range of plants. Farhig, L. 2001. “How Much Is Enough?” Biological Conservation 100(1): 65-74. A useful discussion of habitat requirements for rare and endangered species. Falkowski, Paul G. 2002. “The Ocean’s Invisible ...
Abiotic vs. Biotic Card Sort
Abiotic vs. Biotic Card Sort

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... Owen Lewis: Trophic interactions and tropical tree diversity Evidence is accumulating that the structure and diversity of plant communities in a variety of ecosystems can be profoundly influenced by interactions with their natural enemies, such as pathogens and herbivores. In tropical forests, densi ...
exam review chapter 1-11 - Campbell Hall Online Learning
exam review chapter 1-11 - Campbell Hall Online Learning

... Herbivores/primary consumers are heterotrophs that consume producers, secondary consumers are carnivores that eat primary consumers, tertiary consumers are animals that eat secondary consumers (rare) Each level is called a trophic level Detritivores get nutrients from dead organisms (soil insects) D ...
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... Ecological Succession - Change in the species composition of a community over time Succession progresses in stages from pioneer species to a climax community. The entire process from bare rock to climax is called a SERE that progresses through SERAL STAGES Early seral stages – low diversity, simple ...
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m5zn_cd7db12d6bc120f

... stored in the earth for millions of years. • When human activity alters flow rates or storage times in these natural cycles, overwhelming the environment’s ability to process them, these materials can become pollutants. • On a global scale, this movement is referred to as ...
Unit 3 notes - novacentral.ca
Unit 3 notes - novacentral.ca

... o For example in figure 6.3 on page 94 all the animals, Raccoon, bass, duck etc. are consumers. o Consumers are so named because they have to eat or consume their food. o 1st-order or primary consumers eat producers. o 2nd-order or secondary consumers eat primary consumers. o 3rd-order or tertiary c ...
How are the borders of an ecosystem defined
How are the borders of an ecosystem defined

... anadromous fish to the carbon and nitrogen content of organisms in food webs. One study found salmon contributed 10.9% of the nitrogen found in invertebrate predators and 17.5% in the foliage of riparian plants. While it is not surprising to find that aquatic invertebrates which feed on salmon eggs ...
Ecology
Ecology

... well. Communities are composed only of biotic factors, aka living organisms. Abiotic factors like sunlight, temperature, and terrain are not considered part of a community; these factors are part of the ecosystem, which can contain one or more communities of organisms. ...
Staddon et al 2010
Staddon et al 2010

... (changes in nutrient retention ⁄ loss, and gas flux) and that these effects would be mitigated in larger or more connected habitats. Specifically, we tested four hypotheses. First, fragmentation will induce non-random biodiversity loss associated primarily with the extinction of large-bodied top pre ...
symbiosis in eco-industrial park: lessons on planning a symbiotic city
symbiosis in eco-industrial park: lessons on planning a symbiotic city

... Theory of Urban Planning and Development has been open to integrating other models and practices towards the goal of developing better and sustainable cities. In context of this progressive and open assimilatory thinking, this paper discusses the concept of symbiosis and model of eco-industrial park ...
Jeopardy
Jeopardy

... Biomass refers to the total mass of living plants animal's, fungi and bacteria living in the given area. ...
4.02_Abiotic and Biotic Factors Explained
4.02_Abiotic and Biotic Factors Explained

... Previous pages elaborated on the importance of light to the freshwater community. Some factors can affect the amount of light received by autotrophic organisms (organisms that perform photosynthesis) can affect their level of photosynthesis and respiration, hence affect their abundance and therefore ...
Standard B-6
Standard B-6

... A symbiotic relationship exists between organisms of two different species that live together in direct contact. The balance of the ecosystem is adapted to the symbiotic relationship. If the population of one or other of the symbiotic organisms becomes unbalanced, the populations of both organisms w ...
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Ecosystem



An ecosystem is a community of living organisms in conjunction with the nonliving components of their environment (things like air, water and mineral soil), interacting as a system. These biotic and abiotic components are regarded as linked together through nutrient cycles and energy flows. As ecosystems are defined by the network of interactions among organisms, and between organisms and their environment, they can be of any size but usually encompass specific, limited spaces (although some scientists say that the entire planet is an ecosystem).Energy, water, nitrogen and soil minerals are other essential abiotic components of an ecosystem. The energy that flows through ecosystems is obtained primarily from the sun. It generally enters the system through photosynthesis, a process that also captures carbon from the atmosphere. By feeding on plants and on one another, animals play an important role in the movement of matter and energy through the system. They also influence the quantity of plant and microbial biomass present. By breaking down dead organic matter, decomposers release carbon back to the atmosphere and facilitate nutrient cycling by converting nutrients stored in dead biomass back to a form that can be readily used by plants and other microbes.Ecosystems are controlled both by external and internal factors. External factors such as climate, the parent material which forms the soil and topography, control the overall structure of an ecosystem and the way things work within it, but are not themselves influenced by the ecosystem. Other external factors include time and potential biota. Ecosystems are dynamic entities—invariably, they are subject to periodic disturbances and are in the process of recovering from some past disturbance. Ecosystems in similar environments that are located in different parts of the world can have very different characteristics simply because they contain different species. The introduction of non-native species can cause substantial shifts in ecosystem function. Internal factors not only control ecosystem processes but are also controlled by them and are often subject to feedback loops. While the resource inputs are generally controlled by external processes like climate and parent material, the availability of these resources within the ecosystem is controlled by internal factors like decomposition, root competition or shading. Other internal factors include disturbance, succession and the types of species present. Although humans exist and operate within ecosystems, their cumulative effects are large enough to influence external factors like climate.Biodiversity affects ecosystem function, as do the processes of disturbance and succession. Ecosystems provide a variety of goods and services upon which people depend; the principles of ecosystem management suggest that rather than managing individual species, natural resources should be managed at the level of the ecosystem itself. Classifying ecosystems into ecologically homogeneous units is an important step towards effective ecosystem management, but there is no single, agreed-upon way to do this.
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