与1993年资料相比，生物量及栖息密度显著降低。
Compared with the data of 1993, the biomass and inhabit density reduced obviously.
浮游动物生物量与浮游植物密度的季节变化趋势相一致。
The seasonal variation of zooplankton biomass was in agreement with that of phytoplankton density.
本文研究了浙江省松阳县关山源地区黄山松种群的密度与生物量动态以及它们之间的相互关系。
This study was carried out at Guanshanyuan, Songyang County, Zhe-jiang Province. Density and biomass dynamics as well as their interrelationship for Pinus taiwanensis populations are described.
内容包括造林密度与树冠结构、造林密度与林木生长特性、造林密度与生物量等关系的研究。
The studied items include the relationship between planting density and crown structure, planting density and growth characteristics, planting density and biomass etc.
土壤动物密度及生物量与调落物年归还量、土壤有机质含量、植被盖度等均呈正相关关系；
The density and biomass of soil animal has a positive interrelation to the present content of the fallen, the content of organic substance in soil and vegetation coverage.
我在这里发现，食草哺乳动物的种群密度与生物量，堪与状况最好的东非大草原地区相比。
I determined that densities and biomass of herbivorous mammals in Nagarahole were comparable to some of the best East African Savannah areas.
放牧绵羊的食物组成与各种植物在群落中的相对生物量和高度呈极显著的正相关，而与密度相关性不大。
The selective ingestion of herbage had a positive correlation with herbage relative biomass and height , but it had no obvious correlation with density.
放牧绵羊的食物组成与各种植物在群落中的相对生物量和高度呈极显著的正相关，而与密度相关性不大。
The selective ingestion of herbage had a positive correlation with herbage relative biomass and height , but it had no obvious correlation with density.
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