Native Dreissena freshwater mussels in the Balkans: in and out of ancient lakes
Native Dreissena freshwater mussels in the Balkans: in and out of ancient lakes
复制标题
巴尔干半岛本土 Dreissena 淡水贻贝：进出古湖泊
DOI：
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发表时间：
2010
期刊：
影响因子：
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通讯作者：
T. Kevrekidis
中科院分区：
文献类型：
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作者：
T. Wilke;R. Schultheiß;C. Albrecht;N. Bornmann;S. Trajanovski;T. Kevrekidis
抽象的。巴尔干地区是一个生物地理高度多样化的地区，也是世界范围内淡水多样性的热点地区。这种多样性的很大一部分归因于其西南部公认的和潜在的古代湖泊。然而，尽管进行了大量的研究工作，但这些湖泊之间的动物关系仍不清楚。因此，来自 Dreissena 贻贝属本土代表的遗传信息在这里被用来测试巴尔干半岛西南部的生物地理分区，将人口变化与环境变化联系起来，评估生态孤立程度，重建其进化历史，并探索本土类群入侵的潜力。系统发育和种群遗传分析表明，大多数研究种群属于两个本地物种：D. presbensis（包括来自奥赫里德湖的独特遗传亚群“D. stankovici”）和 D. blanci。此外，巴尔干半岛西南部首次确认了入侵性多形藻的记录。本地 Dreissena spp. 的分布。通常与先前根据鱼类数据建议的生物地理分区一致。然而，对于该地区古湖泊归属于各自的生物地理区域存在分歧。奥赫里德湖的数据并不是决定性的。然而，建议普雷斯帕湖与瓦尔达尔地区的湖泊以及可能与北爱奥尼亚地区的湖泊有更密切的生物地理联系。 Dreissena spp 进化史的重建。表明人口在最近一段时间经历了人口和空间扩张。 “D. stankovici”的扩张开始于大约 320 000–300 000 年前，D. blanci 的扩张开始于 160 000–140 000 年前，D. presbensis 的扩张开始于 110 000–70 000 年前。这些时间范围是在奥赫里德湖和普雷斯帕湖的现有古地质数据的背景下讨论的。有人认为，区域环境变化可能对本地 Dreissena spp. 的种群历史产生了显着影响，尽管奥赫里德湖的高缓冲能力可能减轻了“D. stankovici”的这些影响。此外，影响各个湖泊的当地事件很可能对 Dreissena spp 的人口历史产生相当大的影响。以及。观察到的进出古代湖泊的移民模式可能表明，有限的基因流动使得少数孤立的亚种群得以生存，而后来的生态孤立性（当地采用群体的选择优势）可能阻止了密切相关的类群的过度杂交和同源。至于本土 Dreissena spp. 的潜在入侵性，推断的空间扩张不是人类介导的，所有类群似乎仍然局限于其原生范围。然而，令人担忧的是，如今，D. presbensis 和 D. blanci 也出现在人工水体中，并且入侵性 D. polymorpha 已到达该地区。
Abstract. The Balkans is a biogeographically highly diverse region and a worldwide hotspot of endemic freshwater diversity. A substantial part of this diversity is attributed to well recognized and potential ancient lakes in its southwestern part. However, despite considerable research efforts, faunal relationships among those lakes are not well understood. Therefore, genetic information from native representatives of the mussel genus Dreissena is here used to test the biogeographical zonation of the southwestern Balkans, to relate demographic changes to environmental changes, to assess the degree of eco-insularity, to reconstruct their evolutionary history, and to explore the potential of native taxa for becoming invasive. Phylogeographical and population genetic analyses indicate that most studied populations belong to two native species: D. presbensis (including the distinct genetic subgroup from Lake Ohrid, "D. stankovici") and D. blanci. In addition, the first confirmed record of invasive D. polymorpha in the southwestern Balkan is presented. The distribution of native Dreissena spp. generally coincides with the biogeographical zonations previously suggested based on fish data. However, there is disagreement on the assignment of the ancient lakes in the area to respective biogeographical regions. The data for Lake Ohrid are not conclusive. A closer biogeographical connection to lakes of the Vardar region and possibly the northern Ionian region is, however, suggested for Lake Prespa. The reconstruction of the evolutionary history of Dreissena spp. suggests that populations underwent demographic and spatial expansions in the recent past. Expansions started around 320 000–300 000 years ago in "D. stankovici", 160 000–140 000 years ago in D. blanci, and 110 000–70 000 years ago in D. presbensis. These time frames are discussed within the context of available paleogeological data for lakes Ohrid and Prespa. It is suggested that regional environmental changes may have had pronounced effects on the population histories of native Dreissena spp., though the high buffer capacity of Lake Ohrid may have lessened these effects in "D. stankovici". In addition, local events influencing individual lakes had very likely considerable effects on the demographic histories of Dreissena spp. as well. The observed patterns of immigration and emigration in and out of ancient lakes may suggest that limited gene flow enabled the survival of few isolated subpopulations and that later on eco-insularity (selective advantages of locally adopted groups) may have prevented excessive hybridization and sympatry of closely related taxa. As for the potential invasiveness of native Dreissena spp., the inferred spatial expansions are not human-mediated and all taxa still appear to be restricted to their native ranges. A concern, however, is that today D. presbensis and D. blanci also occur in artificial water bodies, and that invasive D. polymorpha has reached the area.
普雷斯帕湖和奥赫里德湖沉积物记录了过去约 50 年来巴尔干地区的环境变化
影响因子：
4.9
作者：
Wagner B;Vogel H;Zanchetta G;Sulpizio R
通讯作者：
Sulpizio R