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Sere |
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sere [sir]
(ecology) A temporary community which occurs during a successional sequence on a given site. Sere the totality of plant communities (phytocoenoses) that are present in response to changes of the principal environmental factor or factors. The main ecological factors may include moistening or salinization of the soil, the content of humus or mineral nutrients in the soil, and differing grassland and bottomland regimes. The sere is most often associated with changes in the moisture content or salinity of the soil or with simultaneous changes in both these factors. The sere that best reflects changes in the soil moisture content is best observed on slopes in the floodplains of rivers. The soil at the bottom of the slopes usually has a higher moisture content than the soil at the top, with the result that the phytocoenoses of the lower portions contain plants that are more hygrophilous. Moreover, changes in the moisture content are usually accompanied by changes in a number of other factors (temperature, humus content in the soil), although the moisture content remains the principal ecological factor. Seres that are associated with simultaneous changes in both the salinity and moisture content of the soil may be observed along the shores of salt lakes and when the bottoms of such lakes become overgrown with vegetation as they dry out. Seres are also clearly manifested on the gently sloping shores of freshwater lakes that are in the process of bog formation. A. M. BYLOVA Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content. |
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No references found | The skies they were ashen and sober; The leaves they were crisped and sere -- The leaves they were withering and sere; It was night in the lonesome October Of my most immemorial year: It was hard by the dim lake of Auber, In the misty mid region of Weir: -- It was down by the dank tarn of Auber, In the ghoul-haunted woodland of Weir. On every side of me stretched a bleak and desolate expanse of plain, covered with a tall overgrowth of sere grass, which rustled and whistled in the autumn wind with heaven knows what mysterious and disquieting suggestion. Hester gazed after him a little while, looking with a half fantastic curiosity to see whether the tender grass of early spring would not be blighted beneath him and show the wavering track of his footsteps, sere and brown, across its cheerful verdure. |
Sere |
SERD SERDA serdab serdab Serdalo SERDAT SERDEF SERDEP SerDes SerDes SerDes Framer Interface SERDI Serdica Serdica Serditoe Serdiuk, Aleksandr Serdiuk, Aleksandr Ivanovich Serdiuki Serdiukov, Anatolii Serdiukov, Anatolii Ivanovich Serdiukov, Mikhail Serdiukov, Mikhail Ivanovich Serdobsk SERDP SERDP Ecosystem Management Project SERDP Exploratory Development SERDS Sere SEREADSEREB SEREBAR Serebii's Pokemon Palace Forums Serebreniki Serebrennikov, Boris Serebrennikov, Boris Aleksandrovich Sérébriakoff Serebriakov, Pavel Serebriakov, Pavel Alekseevich Serebriakova Serebriakova, Galina Serebriakova, Galina Iosifovna Serebriakova, Zinaida Serebriakova, Zinaida Evgenevna Serebrianka Serebrianka Reservoir Serebriansk Serebrianye Prudy Serebrianyi, Iosif Serebrianyi, Iosif Aleksandrovich Serebrospinaalvog Serebrovskii Serebrovskii, Aleksandr | |||||||
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