Tropical Rain Forests
نویسنده
چکیده
منابع مشابه
Explosive radiation of Malpighiales supports a mid-cretaceous origin of modern tropical rain forests.
Fossil data have been interpreted as indicating that Late Cretaceous tropical forests were open and dry adapted and that modern closed-canopy rain forest did not originate until after the Cretaceous-Tertiary (K/T) boundary. However, some mid-Cretaceous leaf floras have been interpreted as rain forest. Molecular divergence-time estimates within the clade Malpighiales, which constitute a large pe...
متن کاملDiversity and aboveground biomass of lianas in the tropical seasonal rain forests of Xishuangbanna, SW China.
Lianas are important components of tropical forests and have significant impacts on the diversity, structure and dynamics of tropical forests. The present study documented the liana flora in a Chinese tropical region. Species richness, abundance, size-class distribution and spatial patterns of lianas were investigated in three 1-ha plots in tropical seasonal rain forests in Xishuangbanna, SW Ch...
متن کاملInteractions among nitrogen fixation and soil phosphorus acquisition strategies in lowland tropical rain forests.
Paradoxically, symbiotic dinitrogen (N2 ) fixers are abundant in nitrogen (N)-rich, phosphorus (P)-poor lowland tropical rain forests. One hypothesis to explain this pattern states that N2 fixers have an advantage in acquiring soil P by producing more N-rich enzymes (phosphatases) that mineralise organic P than non-N2 fixers. We assessed soil and root phosphatase activity between fixers and non...
متن کاملThreshold Responses to Soil Moisture Deficit by Trees and Soil in Tropical Rain Forests: Insights from Field Experiments
Many tropical rain forest regions are at risk of increased future drought. The net effects of drought on forest ecosystem functioning will be substantial if important ecological thresholds are passed. However, understanding and predicting these effects is challenging using observational studies alone. Field-based rainfall exclusion (canopy throughfall exclusion; TFE) experiments can offer mecha...
متن کاملDoes soil determine the boundaries of monodominant rain forest with adjacent mixed rain forest and maquis on ultramafic soils in New Caledonia?
Within-stand species richness of tropical rain forests is typically high, so that it is not unusual for more than 200 species, including more than 100 tree species, to coexist within 1 ha of tropical rain forest (Whitmore, 1984; Gentry, 1988). However, not all tropical forests have high species richness. Forests growing in suboptimal environments can have reduced richness of higher plants, some...
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