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Ch. 19 & 20 Flashcards

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4380464000EcologyThe science that studies the relations between organisms and their environment and among various ecosystems0
4380477203HabitatA physical location to which an organism is biologically suited. Most species have specific habitat parameters and limits1
4380490653photosynthesisThe process by which plants produce their own food from carbon dioxide and water, powered by solar energy2
4380504477Chlorophylla light-sensitive pigment that resides within chloroplasts in leaf cells of plants; the bases of photosynthesis3
4380515651RespirationThe process by which plants oxidize carbohydrates to derive energy from their operations; essentially, the reverse of the photosynthetic process; release carbon dioxide, water and heat energy into the environment4
4380544695BiomassThe total mass of living organisms on Earth or per unit of a landscape5
4380548805Net Primary ProductionThe net photosynthesis minus respiration for a given community6
4380557643Life ZonesA zonation by altitude of plants and animals that form distinctive communities7
4380570397Limiting FactorsThe physical or chemical factor that most inhibits biotic processes through either lack or excess8
4380578266ProducersOrganism (plant) in an ecosystem that uses carbon dioxide as it sole source of carbon, which it chemically fixes through photosynthesis to provide its own nourishment; also called an autotroph9
4380588709ConsumersOrganism in an ecosystem that depends on producers10
4380597565Food ChainThe circuit along which energy flows from producers, which manufactures their own food, to consumers11
4380614686HerbivoreThe primary consumer in a food web, which eats plant material formed by a producer that has photosynthesized organic molecules12
4380624035CarnivoreA secondary consumer that principally eats meat for sustenance13
4380636708Understorya layer of vegetation beneath the main canopy of a forest.14
4380638812OverstoryThe highest layer of vegetation in a forest, usually forming the canopy.15
4380638813Ground Coverlow-growing, spreading plants that help to stop weeds from growing.16
4380645296Shade Tolerancerefers to a plant's ability to tolerate low light levels. The term is also used in horticulture and landscaping, although in this context its use is sometimes sloppy, especially with respect to labeling of plants for sale in nurseries.17
4380650474Tundraa type of biome where the tree growth is hindered by low temperatures and short growing seasons. The term tundra comes through Russian тундра (tûndra) from the Kildin Sami word tūndâr "uplands", "treeless mountain tract"18
4380659567Boreal Forestis a biome characterized by coniferous forests consisting mostly of pines, spruces and larches. The taiga is the world's largest terrestrial biome.19
4380664256Deciduous Forestdominated by trees that lose their leaves each year. They are found in areas with warm, moist summers and mild winters. The three major areas of this forest type occur in the Northern Hemisphere: eastern North America, East Asia, and Europe.20
4380670650Coniferous Foresta terrestrial biome found in temperate regions of the world with warm summers and cool winters and adequate rainfall to sustain a forest.21
4380702190Rain Foresta luxuriant, dense forest rich in biodiversity, found typically in tropical areas with consistently heavy rainfall.22
4380710012Symbioticany diverse organisms that live together, but in this case, the relationship is not necessarily beneficial to both. Parasites, for example, have a symbiotic relationship with their hosts, but only the parasite benefits.23
4380713572Ecotonea transition area between two biomes. It is where two communities meet and integrate. It may be narrow or wide, and it may be local (the zone between a field and forest) or regional (the transition between forest and grassland ecosystems).24
4380721313Pioneer CommunityThe variety of plants, animals and fungi that first colonize a barren habitat25
4380729847DesertificationA type of land degradation in which a relatively dry land region becomes increasingly arid, typically losing its bodies of water as well as vegetation and wildlife. It is caused by a variety of factors, such as climate change and human activities.26
4380734556Chaparralvegetation consisting chiefly of tangled shrubs and thorny bushes.27
4380738751Fire Ecologya branch of ecology that focuses on the origins of wildland fire and it's relationship to the environment that surrounds it, both living and non-living. A wildland fire is defined as any fire that is burning in a natural environment.28
4380740962Stomataminute aperture structures on plants found typically on the outer leaf skin layer, also known as the epidermis. They consist of two specialized cells, called guard cells that surround a tiny pore called a stoma29
4380754163Slash and Burna method of agriculture in which existing vegetation is cut down and burned off before new seeds are sown, typically used as a method for clearing forest land for farming.30
4380748946Tropical Savannaa rolling grassland scattered with shrubs and isolated trees, which can be found between a tropical rainforest and desert biome. Not enough rain falls on a savanna to support forests. Savannas are also known as tropical grasslands.31
4380775324BiodiversityThe variety of life. It can be studied on many levels. At the highest level, you can look at all the different species on the entire Earth. On a much smaller scale, you can study biodiversity within a pond ecosystem or a neighborhood park.32
4380781878Monoculturethe cultivation of a single crop in a given area.33

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