题目详情
填空题 The Silent Crisis of Life's Diversity While media attention centers on iconic species like elephants, the true driver of biodiversity collapse is not direct (1)__________ but systematic habitat (2). Tropical forests—sheltering 50% of Earth's species—are being (3) through logging and urbanization, fracturing vital ecological (4)__________ that sustain global ecosystems. Humans now claim 4% of terrestrial net primary production (NPP). If population growth (5), this could consume 80% of NPP, surpassing planetary (6). Oceans provide no solution: merely 2% of marine productivity can be used (7)__________ due to microscopic plankton's inaccessibility. The (8)__________ of pollinators jeopardizes crops, while soil (9)__________ diminishes with microorganism loss. Deforestation disrupts water regulation, amplifying flood (10)__________. These cascading failures echo prehistoric mass extinctions in geological strata. A. boundaries B. continues C. destruction D.degradation E. exploitation F. fertility G.fragmented H. immediate I. networks J.outputs K.reduction L.risks M. sustainably N.thresholds O.urgency

学科:学术英语(植科类)
时间:2026-05-11 10:21:04
