1. Large-scale deforestation leads to habitat loss and fragmentation with major consequences for biodiversity. However, the impacts of these environmental disturbances can be mitigated by forest regeneration. We evaluated the effects of forest fragmentation and vegetation recovery on arthropod assemblages in human-modified landscapes in the Amazon.
2. Arthropods were sampled in 10-ha forest fragments, continuous primary forests, and secondary forests using Malaise traps. We identified arthropods in multiple taxonomic resolutions from order to species.
3. We collected 25,230 arthropods belonging to 17 orders. Coleoptera and Hemiptera were more abundant in secondary forests compared to other habitats. A dipteran family (Clusiidae) and a horse fly species (Dichelacera cervicornis—Tabanidae) were identified as indicators of forest fragments and continuous forests, respectively. Similar levels of taxonomic diversity between habitats were documented. The taxonomic composition also was similar between studied habitats in all taxonomic resolutions.
4. Although the studied landscapes suffered strong environmental disturbances four decades ago, the vegetation has been in continuous regeneration since then, favouring the dispersal of arthropods throughout habitats.
5. Forest fragments and old secondary forests contribute to the maintenance of a rich and diverse arthropod assemblage in landscapes composed of large tracts of continuous primary forests.

中文翻译：

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在亚马逊中部经过 40 年的景观更新后，森林碎片、原生林和次生林拥有相似的节肢动物群落

1. 大规模砍伐森林导致栖息地丧失和破碎化，对生物多样性产生重大影响。然而，这些环境干扰的影响可以通过森林再生来减轻。我们评估了森林破碎化和植被恢复对亚马逊人工改造景观中节肢动物组合的影响。
2. 使用 Malaise 陷阱在 10 公顷的森林碎片、连续的原始森林和次生林中对节肢动物进行采样。我们在从顺序到物种的多种分类分辨率中鉴定了节肢动物。
3. 我们收集了属于 17 个目的 25,230 只节肢动物。与其他栖息地相比，次生林中的鞘翅目和半翅目更为丰富。双翅目（Clusiidae）和马蝇（Dichelacera cervicornis -Tabanidae）分别被确定为森林碎片和连续森林的指标。记录了栖息地之间相似水平的分类多样性。在所有分类分辨率中，研究栖息地之间的分类组成也相似。
4. 尽管所研究的景观在 40 年前遭受了强烈的环境干扰，但从那时起，植被一直在不断更新，有利于节肢动物在整个栖息地中扩散。
5. 森林碎片和古老的次生林有助于在由大片连续原始森林组成的景观中维持丰富多样的节肢动物群落。