By Frank Gilliam
Targeting the oft-overlooked herbaceous layer of japanese forests, this quantity combines views from assorted degrees of organic association (ecophysiology to ecosystems) and wooded area kinds (from the jap boreal woodland to southeastern pine forests) right into a synthesis of our wisdom of the ecology of this crucial woodland layer. this is often the 1st booklet of its variety to synthesize details referring to herbaceous layer constitution, composition, and dynamics of various woodland atmosphere kinds in japanese North the United States. With over 1,200 references brought up within the 14 chapters, this publication represents the main complete evaluate of literature at the ecology of the herbaceous layer.
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Additional resources for The Herbaceous Layer in Forests of Eastern North America (Life Sciences)
Sample text
Values in parentheses are contribution of each vegetation layer to the net change in incident precipitation reaching the soil surface. 32 The Environment of the Herbaceous Layer nutrients all are in short supply. In considering the allocation of fixed carbon, any process that reduces the apparent limitations of one or another resource enables increased allocation to obtain another resource that continues to be limited. Hence, conservation and potential capture of nutrients in canopy throughfall by the herbaceous layer reduces the demand for extensive root systems and supports greater shoot growth, thereby enhancing energy capture and, as well, increased foliar absorption of nutrients (Andersson 1992).
1). Most herbaceous species of temperate forests are deciduous, and, with some exceptions, above-ground stem and foliar biomass of all herbaceous species is replaced at least annually. 2). When the rapid decomposition of herbaceous litter is taken into account (see below), it is appropriate to consider herbaceous biomass as part of a labile pool of biological materials that decompose readily. The proportion of biotic material that can be considered to be labile varies with the origin of that material.
These details of the very first stages of the decomposition process do not emerge from more conventional litter-bag studies. 28 The Environment of the Herbaceous Layer More recent work, however, suggests that decomposition of foliar materials can be readily classified into materials whose decomposition is completed in less than a year and those that require longer than a year for completion. Most tree foliage has a decomposition constant (k) Ͻ1. 4). A clear exception to this trend has been observed in foliage of Cornus florida L.