Studies by Hargrave and Geen estimated natural community grazing rates by measuring feeding rates of individual zooplankton species in the laboratory and then computing community grazing rates for field conditions using the known population density of grazers.
由哈格雷夫(Hargrave)和吉恩(Geen)所進(jìn)行的研究，對(duì)自然條件下的群落捕食速率進(jìn)行了估計(jì)，其手段是通過測(cè)量出實(shí)驗(yàn)室內(nèi)單獨(dú)的浮游動(dòng)物種類的捕食速率，然后利用已知的食草動(dòng)物種群密度，計(jì)算出實(shí)地狀況下的群落捕食速率。