Biotope network of dry habitats – uncoordinated technical basis – Hamburg

As part of the technical investigations on the biotope network in Hamburg, a separate biotope network presentation for the dry habitats was developed in 2012. Here, the core and connecting areas, the main interconnection axes, cross-border points of contact and the connecting spaces are displayed for the dry habitats. Dry habitats in Hamburg are limited to only a few areas, which are mainly characterized by glacial sands. Other dry habitats exist on dry slopes or in the area of landfills. Core areas: Core areas are the habitats that are valuable in terms of nature conservation with their often rare plant and animal species, which primarily serve to protect the existing populations of site-typical species, habitats and habitat communities. The core areas are also responsible for the recolonization processes of other areas. Connecting surfaces and elements: In order to connect the core surfaces with each other, suitable connecting surfaces and elements are identified and displayed between them. Main composite axles: The main interconnection axes are used to identify the most important connecting lines, as they are of particular importance for the spatial interrelationships of the individual biotope interconnection areas. Cross-border links: Nature does not stop at borders. The biotope network therefore usually more or less clearly crosses national borders. The most important points of transition to the neighbouring federal states of Schleswig-Holstein and Lower Saxony are represented with point symbols. Connecting rooms: The interconnection spaces are areas that have certain interconnection relationships beyond the core and interconnection surfaces. However, these are so loose that these areas cannot be classified as biotope composite areas in the narrower sense.作为汉堡生境网络（biotope network）技术调研的一部分，研究团队于2012年针对旱地生境（dry habitats）开发了独立的生境网络展示方案。该方案针对旱地生境，展示了其核心区域、连通区域、主要连通轴线、跨境联络点以及连通空间。汉堡的旱地生境仅分布于少数片区，主要以冰碛砂为典型特征；其余旱地生境则见于干燥坡地或填埋场区域。 核心区域： 核心区域是具备自然保护价值的生境，通常栖息有珍稀动植物物种，其核心功能为保护生境典型物种、生境及生境群落的现有种群，同时也承担着为其他区域开展种群再定植的重要作用。 连通地表与要素： 为实现核心地表之间的互联互通，需在核心地表之间识别并标注适宜的连通地表与要素。 主要连通轴线： 主要连通轴线用于标识最为关键的连通线路，因其对各生境连通区域的空间关联具有特殊重要性。 跨境联络点： 自然不受国界限制，生境网络往往会或多或少跨越国境线。本次展示通过点状符号标注了与邻近联邦州石勒苏益格-荷尔斯泰因州及下萨克森州的关键过渡点位。 连通空间： 连通空间是指位于核心区域与连通地表之外、具备一定连通关联关系的区域。但此类区域的连通性较为松散，无法被狭义归类为典型生境连通区域。