| 翻訳と辞書 |
| Jackson Prairie Belt ： ウィキペディア英語版 |
Jackson Prairie
The Jackson Prairie is a 〔 temperate grassland ecoregion in Mississippi. It is a disjunct of the Blackbelt (or Black Prairie) physiographic area.〔(【引用サイトリンク】title=Harrell Prairie Botanical Area )〕
==Description==
The prairie is a narrow strip across the state from the Mississippi River to the border of Alabama. It is only across at its widest, and generally wide. It runs in a diagonal line from near Jackson in the northwest, through Bienville National Forest and southeast to the Alabama border.
The contrast between the alkaline soil of the prairies and the acidic soil of the forests causes the sharp delineation in plant types in each region. In the western portion of the prairie, the soil is a brown loess loam over calcareous clay. In hilly areas, the clay is covered by red and yellow sand from the Pliocene epoch.〔 The underlying clay, an identifying component of the Jackson Prairie Belt, shrinks and swells dramatically based on the amount of rainwater. Each cycle adds to the mounds and depressions, building them up over time.〔
The prairies depend on periodic outbreaks of fire to keep the forest from overgrowing the prairie.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
■ウィキペディアで「Jackson Prairie」の詳細全文を読む
スポンサード リンク
| 翻訳と辞書 : 翻訳のためのインターネットリソース |
Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.
|
|