马提尼克岛的红树林,覆盖1.85公顷的岛屿(<总面积的0.1%),对当地城市相当脆弱,农业,和工业污染物。与温带生态系统不同,可用于评估红树林人为压力的指标有限。这项研究调查了马提尼克岛的四个站点,每个人都受到不同的人为压力。对深度约18厘米的红树林沉积物核心的分析揭示了马提尼克岛红树林上的两种主要压力类型:(i)在法兰西堡高度城市化的海湾内的两个站中有机物的富集和(ii)在四个研究的红树林站中观察到的农业压力。这种压力的特征是污染,超过监管门槛,用狄氏剂,总滴滴涕,和金属(As,Cu和Ni)在植物检疫产品中发现。马提尼克岛的红树林受到不同程度的人为压力,但所有人都受到有机氯农药的污染。与该岛的北部和南部地区相比,法兰西堡海湾内的红树林承受的压力明显更高。在这些背景下,微生物群落表现出不同的反应。受影响较小的两个站的微生物生物量以及细菌和古细菌的丰度较高,在法兰西堡的红树林里,通常与污染环境相关的各种门更为普遍。微生物群组成的这些差异导致了65个分类单元的鉴定,包括刺五加杆菌科,螺旋藻科,和Pirelulaceae,这可能是人为影响马提尼克岛红树林沉积物的指标。
Martinique\'s mangroves, which cover 1.85 ha of the island (<0.1 % of the total area), are considerably vulnerable to local urban, agricultural, and industrial pollutants. Unlike for temperate ecosystems, there are limited indicators that can be used to assess the anthropogenic pressures on mangroves. This study investigated four stations on
Martinique Island, with each being subject to varying anthropogenic pressures. An analysis of mangrove sediment cores approximately 18 cm in depth revealed two primary types of pressures on
Martinique mangroves: (i) an enrichment in organic matter in the two stations within the highly urbanized bay of Fort-de-France and (ii) agricultural pressure observed in the four studied mangrove stations. This pressure was characterized by contamination, exceeding the regulatory thresholds, with dieldrin, total DDT, and metals (As, Cu and Ni) found in phytosanitary products. The mangroves of
Martinique are subjected to varying degrees of anthropogenic pressure, but all are subjected to contamination by organochlorine pesticides. Mangroves within the bay of Fort-de-France experience notably higher pressures compared to those in the island\'s northern and southern regions. In these contexts, the microbial communities exhibited distinct responses. The microbial biomass and the abundance of bacteria and archaea were higher in the two less-impacted stations, while in the mangrove of Fort-de-France, various phyla typically associated with polluted environments were more prevalent. These differences in the microbiota composition led to the identification of 65 taxa, including Acanthopleuribacteraceae, Spirochaetaceae, and Pirellulaceae, that could potentially serve as indicators of an anthropogenic influence on the mangrove sediments of
Martinique Island.