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首页> 外文期刊>Restoration ecology >Land-Use History in Ecosystem Restoration: A 40-Year Study in the Prairie-Forest Ecotone
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Land-Use History in Ecosystem Restoration: A 40-Year Study in the Prairie-Forest Ecotone

机译:生态系统恢复中的土地利用历史:草原森林交错带的40年研究

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摘要

Land-use history, recent management, and landscape position influence vegetation at the Rockefeller Experimental Tract (RET), a 40-year-old restoration experiment in northeast Kansas. RET is representative of the prairie-forest ecotone, containing native tallgrass prairie and oak-hickory forest, but unique in having tracts of replanted prairie, seeded in 1957, that have undergone long-term restoration treatments: burned, grazed, mowed, or untreated. A land-use history database for RET was compiled using a geographic information system to integrate historic and contemporary sources of information. Restoration management on the reseeded prairie has had a profound effect on forest development: mowing or burning precluded forest establishment (<3% forest cover), whereas portions of untreated or grazed areas became heavily forested (>97% forest cover). Forest colonization depends upon biotic and edaphic conditions at the time restoration was initiated: for areas replanted to prairie and managed by grazing, forestation was 6% on land in cultivation prior to replanting, 20% on former pastureland, and 98% on land deforested just before replanting. Patterns of forest colonization were also significantly associated with three landscape positions: near existing forest, along water courses, and along ridge tops. Additionally, land-use history analyses showed that the presence of various prairie and forest species resulted from persistence and not from colonization following restoration. Because of the lasting imprint of historic land use on the landscape, our results indicate that it is essential that restoration studies be evaluated within a site-specific historical context.
机译:洛克菲勒实验区(RET)是堪萨斯州东北部已有40年历史的修复实验,土地利用历史,近期管理和景观位置对植被的影响。 RET是草原-森林过渡带的代表,包含原生的高草草原和橡树山核桃林,但在1957年播种的经过长期恢复处理的大片重新种植的草原中具有独特之处:焚烧,放牧,割草或未经处理。使用地理信息系统汇编了可再生能源技术的土地使用历史数据库,以整合历史和现代信息资源。对重新种植的草原进行恢复管理对森林发展产生了深远影响:割草或焚烧排除了森林(<3%的森林覆盖率),而未经处理或放牧的部分地区森林茂密(> 97%的森林覆盖率)。森林殖民化取决于恢复开始时的生物和生态条件:对于重新种植到草原并通过放牧进行管理的地区,重新种植之前耕种的土​​地上植树造林率为6%,仅原草场为20%,仅砍伐森林为98%再植之前。森林定殖的模式也与三个景观位置显着相关:在现有森林附近,沿水道和沿山脊顶部。此外,土地利用历史分析表明,各种草原和森林物种的存在是持久性造成的,而不是恢复后的殖民化造成的。由于历史土地用途在景观上的持久印记,我们的结果表明,必须在特定地点的历史背景下对恢复研究进行评估。

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