小隔间
发表于 2025-3-26 22:31:20
Microbial Carbon Cycling in Pelagic Ecosystems: Microbial Methods for Ecosystem Scientists then, that ecologists working at the ecosystem scale would be naturally drawn to the study of microorganisms. The factors that regulate the abundance, distribution, growth rate, and respiration of these microorganisms are in large measure the factors that regulate some of the functioning of the ecosystem.
宠爱
发表于 2025-3-27 05:05:53
Introduction. Methods in Ecosystem Science: Progress, Tradeoffs, and Limitationsnment (Odum 1959). It includes plants, animals, and microorganisms, and studies the interactions among them and with the soil, water, and the atmosphere. In pursuing general patterns at the ecosystem level, and when trying to understand the mechanisms controlling these patterns, ecosystem scientists
高尔夫
发表于 2025-3-27 08:56:43
Stand Structure in Terrestrial Ecosystemsined as an area of relatively uniform physical environmental conditions, vegetation structure, and plant community composition (Barbour et al. 1987). By vegetation structure we mean the three-dimensional distribution of aboveground phyto-mass integrated over some period of time. We will not consider
aqueduct
发表于 2025-3-27 12:39:37
Methods of Estimating Aboveground Net Primary ProductivityNPP: the global carbon balance, the location of the missing carbon sink, and predictions of global climate change (see Chapter 3). Primary productivity represents the major input of carbon and energy into ecosystems and McNaughton (1989) proposed NPP as an integrative variable of the functioning of
Harass
发表于 2025-3-27 16:30:27
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酷热
发表于 2025-3-27 20:03:55
Methods of Estimating Belowground Net Primary Productionrrestrial ecosystems (Milchunas and Lauenroth 1992; Nadelhoffer and Raich 1992). Estimates of the ratio of BNPP to net primary production (NPP) across ecosystem types range from less than 0.20 to more than 0.80 (Bray 1963, Coleman 1976). Part of this range can be explained by differences among ecosy
vascular
发表于 2025-3-28 01:41:54
The Measurement of Primary Production in Aquatic Ecosystemsergy comes from sunlight, which is converted into the energy of organic matter in living biomass through the process of primary production, and from imports of organic matter from adjacent ecosystems. This import of energy in organic matter is, of course, dependent upon primary production in the “up
chalice
发表于 2025-3-28 03:40:55
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金盘是高原
发表于 2025-3-28 07:41:26
Decomposition and Soil Organic Matter Dynamicsons such as ammonium, calcium (Ca.), potassium (K.), and other elements originally assimilated by the organisms now decomposing. At various points along this path the decomposing organic matter is consumed and metabolized by other organisms, which themselves will die and decompose. Decomposition is
graphy
发表于 2025-3-28 14:16:55
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