مشخصات کلی Identification of the main driving mechanisms in the evolution of a small coastal wetland (Traba, Galicia, NW Spain) since its origin 5700 cal yr BP
نویسنده کتاب (Author):
Bao, Roberto; Alonso, Ángela; Delgado, Cristina; Pagés, Jose Luis
انتشارات (Publisher):
ویرایش و نوع فایل (Edition/Format):
Downloadable article : English
منبع (Database):
عنوان ژورنال (Publication):
bao-r-alonso-a-delgado-c-pages-j-l-2007-identification-of-the-main-driving-mechanisms-in-the-evolution-of-a-small-coastal-wetland-traba-galicia-nw-spain-since-its-origin-5700-ca
موضوع (Subject):
Coastal evolution Coastal palaeoenvironments Sea-level change View all subjects
توضیحات خلاصه (Summary):
This paper examines the interdependence among the different forcing factors in the evolution of the Traba coastal wetland (Galicia, NW Spain) based on lithofacies and diatom analyses of three cores reaching the basement. According to radiocarbon data, the wetland originated 5700 cal yr BP, a time when similar systems on the Atlantic coast of the Iberian Peninsula were formed. Diatom assemblage data allow the estimation of the sea level position at 5700 cal yr BP at least 7 m below present-day mean sea level. Attenuation of the sea-level rise at that time was a major driving mechanism that permitted the establishment of an incipient beach–dune complex, causing water-logging in the Traba basin. However, the location of this incipient wetland on a basement high, which prevented an open connection to the sea, made topographic inheritance the main forcing factor in the subsequent evolution of the wetland. Thus, Traba was never a coastal lagoon system, as it has sometimes been defined. The maximum permeability of the beach–dune complex enclosing the wetland was recorded after its origin until 2900 cal yr BP, when increased stormy conditions affected the Galician shelf waters. Since then, the evolution of the wetland has been mainly controlled by more local factors, especially the continental sediment supply. Changes in land use in the basin have accelerated the infilling of the water body since the 19th century. This rapid infilling makes the whole system more prone to total encroachment in the short term, rather than to sea drowning. Palaeoenvironmental analyses showing the main trends in the long-term evolution of coastal wetlands can be of key importance in any management decisions aimed at preserving these kinds of sensitive coastal environments. Read more…
ژانر / فرم:info:eu-repo/semantics/article
موضوع:Internet resource
نوع منبع:Internet Resource, Article
تمام نویسندگان / همکاران: Bao, Roberto; Alonso, Ángela; Delgado, Cristina; Pagés, Jose Luis
شناسه OCLC:979265265
Language Note:English
فهرست محتوا:0031-0182 http://hdl.handle.net/2183/18269
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