Composição e configuração da paisagem da sub-bacia do arroio jacaré, Vale do Taquari, RS, com ênfase nas áreas de florestas
Composição e configuração da paisagem da sub-bacia do arroio jacaré, Vale do Taquari, RS, com ênfase nas áreas de florestas
复制标题
雅卡雷谷的组合和配置，Vale do Taquari，RS，与弗洛里斯塔斯地区一起使用
DOI：
10.1590/s0100-67622009000400013
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发表时间：
2009
期刊：
影响因子：
0.5
通讯作者：
Claudete Rempel
中科院分区：
文献类型：
--
作者：
Gisele Cemin;Eduardo Périco;Claudete Rempel
由于微小生境的丧失、分散和迁徙格局的改变、生境的孤立和土壤侵蚀，连续森林覆盖区转变为森林碎片，导致了生物多样性的减少。这些问题的解决与水文流域的规划和维护密切相关。雅卡雷的溪流子盆地位于俄亥俄州塔夸里山谷，面积为538，98平方公里，其中部分或全部插入了9个市辖区。该盆地处于落叶季节林(DSF)和混交林(MOF)植物群落的交错区。利用Landsat 7 ETM+卫星第04/02/2002通道的图像和地理信息系统(GIS)IDRISI 3.2和Landscape Ecology Fragstats 3.3软件系统的图像，详细阐述和分析了该地区现有森林类别(DSF、MOF和次生植被)的结构特征。结果表明，该地区约有52%的原始森林被保留或正在更新中，但破碎化程度很高，87.82%的碎片小于1公顷。考虑到50米的边界效应，大约40%的碎片仍然存在核区域。
The conversion of continuous forest coverage areas into forest fragments has contributed to the decrease of the biological diversity due to the micro-habitat loss, changes in dispersion and migration patterns, habitats' isolation and soil erosion. The solution for those problems is intimately linked to the planning and maintenance of hydrographic basins. Jacare's stream sub-basin is located in Taquari Valley, RS, with an area of 538,98 km2, where nine municipal districts are partially or totally inserted. This basin is in an ecotone area among the plant formations Deciduous Seasonal Forest (DSF) and Mixed Ombrophila Forest - Araucaria Forest (MOF). Information related to the structural characteristics of the existent forest classes in the area (DSF, MOF and secondary growth vegetation) was elaborated and analyzed using images from the satellite Landsat 7 ETM+, passage 04/02/2002 and Geographical Information Systems (GIS) Idrisi 3.2 and Landscape Ecology Fragstats 3.3 software systems. The results indicate that the area presents approximately 52% of native forests that are preserved or in regeneration process, but in a highly fragmented way, with 87,82% of the fragments smaller than 1ha. Considering a border effect of 50m, around 40% of the fragments still present a nuclear area.