Vegetation History and Estuarine Ecology of the Texas Gulf Coastal Plain in Relation to Climate and Sea-Level Changes According to Three Pollen Cores

IF 2.3 Q2 GEOSCIENCES, MULTIDISCIPLINARY
Quaternary Pub Date : 2023-03-09 DOI:10.3390/quat6010019
B. Albert
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引用次数: 0

Abstract

The vegetation history of the Texas Gulf Coastal Plain in the Holocene is considered according to pollen evidence from three coring sites where both terrestrial and marine ecology are reconstructed. These pollen sites record oscillations in the limit of the Southeastern US Forest zone in relation to climate changes, with a major, southward migration of the forest limit and expansion of the range limit of Betula nigra being recorded in the 6th millennium BP and a northward migration in the 4th millennium BP. The appearance of Rhizophora pollen also indicates increased tropical influence in the Middle Holocene. Moreover, changes in the salinity profiles of estuaries are reconstructed in relation to broader coastal environmental changes, such as sea-level oscillations and the formation of barrier islands, with a major sea-level transgression phase being recorded in the 4th millennium BP and still-stand conditions after the 3rd millennium BP. These vegetation changes are finally compared to occupational evidence of prehistoric humans in the Central Texas Gulf Coastal Plain region in relation to ecological factors. Here, human occupation of the coastal zone is correlated with afforestation, the proliferation of pecan and the emergence of low-salinity estuaries.
基于三个花粉芯的德克萨斯湾沿岸平原植被历史和河口生态与气候和海平面变化的关系
根据三个重建陆地和海洋生态的取芯点的花粉证据,考虑了德克萨斯湾海岸平原全新世的植被历史。这些花粉点记录了美国东南部森林带界限与气候变化有关的振荡,在公元前6千年记录到了黑桦的森林界限的主要向南迁移和范围界限的扩大,在公元后4千年记录了向北迁移。Rhizophora花粉的出现也表明全新世中期热带影响的增加。此外,河口盐度剖面的变化是根据更广泛的沿海环境变化重建的,如海平面振荡和障壁岛的形成,第4千年BP记录了主要的海平面海侵阶段,第3千年BP之后仍然保持原状。最后,将这些植被变化与德克萨斯州中部海湾沿岸平原地区史前人类在生态因素方面的职业证据进行了比较。在这里,人类对海岸带的占领与植树造林、山核桃的繁殖和低盐度河口的出现有关。
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来源期刊
Quaternary
Quaternary GEOSCIENCES, MULTIDISCIPLINARY-
CiteScore
3.30
自引率
4.30%
发文量
44
审稿时长
11 weeks
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