Identifying environmental drivers of fungal non-pollen palynomorphs in the montane forest of the eastern Andean flank, Ecuador
Identifying environmental drivers of fungal non-pollen palynomorphs in the montane forest of the eastern Andean flank, Ecuador
复制标题
确定厄瓜多尔安第斯山脉东侧山地森林中真菌非花粉孢粉型的环境驱动因素
DOI：
10.1017/qua.2017.73
复制
发表时间：
2017
影响因子：
2.3
通讯作者：
Loughlin N
中科院分区：
文献类型：
--
作者：
Loughlin N
从沉积档案中提取的样品表明，真菌非花粉palynomorphs（NPPs）可用于提供有关厄瓜多尔安第斯山脉东侧山地森林的森林覆盖，火灾制度和沉积环境的信息。在52个样本检查，54真菌NPP形态型的报告，其中25个被发现是以前未描述的。在森林覆盖率梯度（2-64%）上对真菌NPPs的检测显示了三种不同的组合：（1）低森林覆盖率（<8%）的脉孢菌属（Neurospora）、伊布-16、HdV-201、HDV-102和HDV-110，表明一种开放的退化景观;（2）中等森林覆盖率（8-32%）Cercophora-type 1，Xylariaceae，Rosellinia-type，Kretzschmariadeusta，Amphirosellinia，Sporormiella，（3）高森林覆盖率（32-63%）的Anthostomella fuegiana、Anthostomella fuegiana-5、Anthostomella-101、Anthostomella-108和Anthostomella-120。森林覆盖（森林花粉），可用水分（水生遗骸），区域火灾制度（微木炭）和沉积物成分（有机碳）的环境变量被发现解释真菌NPP数据集的方差的40%。火被认为是真菌NPP组合组成的主要控制，与有效水分和沉积物组成的下一个最重要的因素。
Samples taken from sedimentary archives indicate that fungal non-pollen palynomorphs (NPPs) can be used to provide information on forest cover, fire regime, and depositional environment in the eastern Andean flank montane forest of Ecuador. Within the 52 samples examined, 54 fungal NPP morphotypes are reported, of which 25 were found to be previously undescribed. Examination of fungal NPPs over a gradient of forest cover (2–64%) revealed three distinct assemblages: (1) low (<8%) forest cover Neurospora, IBB-16, HdV-201, OU-102, and OU-110 indicative of an open degraded landscape; (2) medium (8–32%) forest cover Cercophora-type 1, Xylariaceae, Rosellinia-type, Kretzschmaria deusta, Amphirosellinia, Sporormiella, and Glomus suggestive of a forested landscape disturbed by herbivores and soil erosion; and (3) high (32–63%) forest cover Anthostomella fuegiana, OU-5, OU-101, OU-108, and OU-120. Environmental variables for forest cover (forest pollen), available moisture (aquatic remains), regional fire regime (microcharcoal), and sediment composition (organic carbon) were found to explain ~40% of the variance in the fungal NPP data set. Fire was found to be the primary control on fungal NPP assemblage composition, with available moisture and sediment composition the next most important factors.