Vernal pool flowers, with different species occurring in bands related to soil moisture and temperature gradients formed as the pool dries out. Sacramento National Wildlife Refuge, Calif.
Obtained from http://geochange.er.usgs.gov/sw/impacts/biology/vernal/

本图片在美国属于公有领域，因为其只包含最初来自美国内政部下属机构美国地质调查局的材料。更多信息请参见USGS官方版权方针。 Bahasa Indonesia ∙ català ∙ čeština ∙ Deutsch ∙ eesti ∙ English ∙ español ∙ français ∙ galego ∙ italiano ∙ Nederlands ∙ português ∙ polski ∙ sicilianu ∙ suomi ∙ Tiếng Việt ∙ Türkçe ∙ български ∙ македонски ∙ русский ∙ മലയാളം ∙ 한국어 ∙ 日本語 ∙ 中文 ∙ 中文（简体） ∙ 中文（繁體） ∙ العربية ∙ فارسی ∙ +/−