Dataset Direct Download Service (WFS): Sensitivity Maps — Maps Natural Regions — Cordulegaster_bidentata (Bidental Cordulegastre)

Sensitivity maps made by the ODONAT Grand Est network in 2018-2019. The distribution of the species is represented from recent occurrence data (1999-2018 or 2009-2018 by species). These are natural areas in which at least one observation of the species has been carried out in the recent period, as well as natural regions where the species is highly suspected (i.e. experts) or has older data. In each of the natural regions with recent non-marginal observations, this presence is represented by the calculation of the proportion of 1 x 1 km meshes in which the species was observed. For an explanation of the method of calculation, refer to the Natural Regions Map Explanation Sheet. Natural regions identify areas in which abiotic conditions (relief, geology, climate...) are relatively homogeneous. In fact, the observation of a species in a natural region (even at a single location) provides a strong presumption of other favourable habitats elsewhere in the natural region. Any observations shall be taken into account: they can be implanted populations, but also erratic individuals. This layer represents the state of knowledge at the time of its realisation, it should not be considered exhaustive. The presence of the species outside the identified areas is possible. Refer to the card reading instructions as well as PDF cards for more information.2018-2019年间，由ODONAT Grand Est网络（ODONAT Grand Est）制作的物种敏感性分布图。 本数据集基于按物种区分的近期出现记录（时段为1999-2018年或2009-2018年）表征物种分布情况。 其涵盖的区域包括近期至少开展过一次该物种观测记录的自然区域，以及经专家高度疑似存在该物种、或存有较老观测记录的自然区域。 对于存在近期非边缘观测记录的自然区域，其物种存在情况通过统计该区域内观测到该物种的1×1平方千米网格占比来表征。如需了解计算方法的详细说明，请参阅《自然区域地图说明手册》。 自然区域指非生物环境（地形、地质、气候等）相对均一的区域。 实际上，只要在某一自然区域内观测到该物种（即便仅单个点位），即可有力推定该区域内其他区域也存在适宜该物种栖息的生境。 所有观测记录均纳入考量范畴，既包括人工引种种群，也包括偶见个体。 本图层仅反映其制作完成时的认知现状，不应被视为涵盖所有分布范围；在本数据集划定区域之外，仍有可能存在该物种的分布点位。 如需获取更多信息，请参阅读图说明及配套PDF卡片。