Polystichum lemmonii - Shasta Fern : 無料・フリー素材/写真
Polystichum lemmonii - Shasta Fern / brewbooks
| ライセンス | クリエイティブ・コモンズ 表示-継承 2.1 |
|---|---|
| 説明 | Polystichum lemmonii the signature fern for serpentine soil growing with Castilleja elmeriArthur Kruckeberg: "Of the western ferns on serpentine, only Polystichum lemmonii is obligate,"Source Hardy Fern LibraryDryopteridaceaeFernLemmon's holly-fern, Shasta fernA serpentine soil is derived from ultramafic rocks, in particular serpentinite, a rock formed by the hydration and metamorphic transformation of ultramafic rock from the Earth's mantle.The soils derived from ultramafic bedrock give rise to unusual and sparse associations of edaphic (and often endemic) plants that are tolerant of extreme soil conditions, including:low calcium:magnesium ratiolack of essential nutrients such as nitrogen, potassium, and phosphorus andhigh concentrations of the heavy metals (more common in ultramafic rocks)These plants are commonly called serpentine endemics, if they grow only on these soils. (Serpentinite is composed of the mineral serpentine, but the two terms are often both used to mean the rock, not its mineral composition.)Source: en.wikipedia.org/wiki/Serpentine_soil accessed 14 Aug 2010On serpentine rock and soil, Ingalls Lake trail, Kittitas County, Washington, USAi090909 228 |
| 撮影日 | 2009-08-08 10:29:45 |
| 撮影者 | brewbooks , near Seattle, USA |
| タグ | |
| 撮影地 | Washington, United States 地図 |
| カメラ | Canon PowerShot SD850 IS , Canon |
| 露出 | 0.003 sec (1/400) |
| 開放F値 | f/2.8 |
| 焦点距離 | 14506.66667 dpi |