Arid
DOI10.1016/j.geomorph.2006.07.023
Precontact vegetation and soil nutrient status in the shadow of Kohala Volcano, Hawaii
Chadwick, Oliver A.1; Kelly, Eugene F.2; Hotchkiss, Sara C.3; Vitousek, Peter M.4
通讯作者Chadwick, Oliver A.
来源期刊GEOMORPHOLOGY
ISSN0169-555X
EISSN1872-695X
出版年2007
卷号89期号:1-2页码:70-83
英文摘要

Humans colonized Hawaii about 1200 years ago and have progressively modified vegetation, particularly in mesic to dry tropical forests. We Use delta C-13 to evaluate the contribution Of C-3 and C-4 plants to deep soil organic matter to reconstruct pre-human contact vegetation patterns along a wet to dry climate transect on Kohala Mountain, Hawaii Island. Precontact vegetation assemblages fall into three distinct zones: a wet C-3 dominated closed canopy forest where annual rainfall is > 2000 mm, a dry C-4 dominated grassland with annual rainfall < 500 mm, and a broad transition zone between these communities characterized by either C-3 trees with higher water-use efficiency than the rainforest trees or C3 trees with a small amount Of C-4 grasses intermixed. The likelihood Of C-4 grass understory decreases with increasing rainfall. We show that the total concentration of rock-derived nutrients in the < 2-mm soil fraction differs in each of these vegetation zones. Nutrient losses are driven by leaching at high rainfall and by plant cycling and wind erosion at low rainfall. By contrast, nutrients are best preserved in surface soils of the intermediate rainfall zone, where rainfall supports abundant plant growth but does not contribute large amounts of water in excess of evapotranspiration. Polynesian farmers exploited these naturally enriched soils as they intensified their upland agricultural systems during the last three centuries before European contact. (c) 2006 Elsevier B.V. All rights reserved.


英文关键词tropical dry forest tropical grasslands paleoclimate stable carbon isotopes
类型Article ; Proceedings Paper
语种英语
国家USA
收录类别SCI-E ; CPCI-S
WOS记录号WOS:000251894900006
WOS关键词ECOSYSTEM DEVELOPMENT ; ISOTOPIC COMPOSITION ; CHANGING SOURCES ; MOJAVE-DESERT ; EVOLUTION ; CALIFORNIA ; LANDSCAPE ; COMPLEXES ; PHOSPHATE ; ISLANDS
WOS类目Geography, Physical ; Geosciences, Multidisciplinary
WOS研究方向Physical Geography ; Geology
来源机构Colorado State University
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/154349
作者单位1.Univ Calif Santa Barbara, Dept Geog, Santa Barbara, CA 93106 USA;
2.Colorado State Univ, Dept Crop & Soil Sci, Ft Collins, CO 80523 USA;
3.Univ Wisconsin, Dept Bot, Madison, WI 53706 USA;
4.Stanford Univ, Dept Biol Sci, Stanford, CA 94305 USA
推荐引用方式
GB/T 7714
Chadwick, Oliver A.,Kelly, Eugene F.,Hotchkiss, Sara C.,et al. Precontact vegetation and soil nutrient status in the shadow of Kohala Volcano, Hawaii[J]. Colorado State University,2007,89(1-2):70-83.
APA Chadwick, Oliver A.,Kelly, Eugene F.,Hotchkiss, Sara C.,&Vitousek, Peter M..(2007).Precontact vegetation and soil nutrient status in the shadow of Kohala Volcano, Hawaii.GEOMORPHOLOGY,89(1-2),70-83.
MLA Chadwick, Oliver A.,et al."Precontact vegetation and soil nutrient status in the shadow of Kohala Volcano, Hawaii".GEOMORPHOLOGY 89.1-2(2007):70-83.
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