| 词汇 | understorey |
| 释义 | understorey noun[ C or U ] biology, environment UKspecialized(USunderstory)uk /ˈʌn.dəˌstɔː.ri/ us /ˈʌn.dɚˌstɔːr.i/ a layer of plants and bushes that grows under the canopy (= the thick, high roof formed by branches and leaves) of a forest: 下层林木 There are many old plants, as well as a thriving understorey of seedlings.这里有许多古老的植物，也有茁壮生长的下层林木。 The article examines the effects of surface fires on understorey in central Brazilian Amazonia.本文探讨的是巴西中部亚马逊地区地表火灾对下层林木的影响。 Forestry afforestation agroforestry arborist brush carbon sink clearing cut down deforest lumberjack old growth ranger reafforest slash-and-burn the treeline tropical rainforest undercut unforested woodcutter woodsy woody Examples of understoreyunderstorey Our sample size for understorey trees (only six species) may not be representative. In fact, the understorey during the dry season was hotter and drier than the lab clearing in the rainy season. Two gap and understorey paired sites, one in each of the forest types were used in both rainy and dry seasons. If competition for light or soil resources is important in the understorey, recently abandoned nests could constitute competition-free sites where successful recruitment is more likely. In conclusion, we have found that leaf-cutting ant nests can change the understorey plant community greatly. In addition to soil effects, recruitment on abandoned nests could be affected by interactions among understorey plant species. Integration of the soil moisture over both layers can lead to similar soil moisture values as in the understorey. In understorey plots where five seedlings with four or more leaves could not be found, every available leaf was sampled. Concurrent vegetation surveys indicated that secondary forests had high levels of terrestrial and understorey browse. These data suggest that small lianas may be abundant in the understorey but are not successful in reaching the canopy in older forests. Differences in home range size and foraging strategies may explain why understorey fruit bat species are more sensitive to fragmentation than canopy ones. Such a level of illumination is only experienced in the understorey during brief sunflecks. All understorey plots were beneath closed canopy (>20 m height), and >20 m from any canopy opening. In contrast, estimates of canopy openness with a spherical densiometer showed only a weak relation to light intensities in the understorey. The individuals we studied grew up in relatively dark conditions (in the understorey of the forest) when they were young. See all examples of understorey These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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