Kidney-Failure
发表于 2025-3-25 04:37:39
Chemistry,ontinuously open plastic collectors (Likens et al., 1967). Samples of stream water are collected approximately 10 m upstream from each weir in clean polyethylene bottles. This is necessary because water collected from the ponding basin above the weir would be contaminated by calcium and bicarbonate
记忆
发表于 2025-3-25 11:19:37
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业余爱好者
发表于 2025-3-25 13:21:05
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Functional
发表于 2025-3-25 19:04:54
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老人病学
发表于 2025-3-25 23:10:28
The Northern Hardwood Ecosystem at Hubbard Brook in Relation to Other Forest Ecosystems in the Worlsmall area, 92% of the Earth’s plant biomass and 46% of its annual net primary production come from forest (Table 23). The 79.9 billion metric tons of dry plant matter produced (net) each year by forests exceeds the total net primary production of the oceans, even though the oceans are more than six
appall
发表于 2025-3-26 03:26:38
Epilog,geochemist. Actually he was a brilliant, yet humble student of nature in the purest sense. Much of what this little book has described in quantitative terms Aldo Leopold outlined in general terms 45 yr ago. His insight and prose have been an inspiration to us for a long time.
Inflammation
发表于 2025-3-26 06:34:52
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dapper
发表于 2025-3-26 09:47:12
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MILK
发表于 2025-3-26 16:21:06
Reiner Marchthaler,Sebastian Dingler dry plant matter produced (net) each year by forests exceeds the total net primary production of the oceans, even though the oceans are more than six times larger in area. The animal biomass in these forests represents 68% of the total found on continental land masses (Whittaker and Likens, 1973).
muster
发表于 2025-3-26 20:04:50
Nutrient Cycles,rosion, and sedimentation), landslides, vulcanism, and biologic agents. The presence of a prominent gaseous component in the biogeochemical cycle (e.g., C, N, and S) greatly complicates measurement and analysis, as discussed previously.