We used presence data to evaluate the role of small patches in bird conservation in the Cape Coast Metropolis of Ghana by surveying 24 forest patches. Cumulative species-area and number curves were plotted by ordering patch size from large to small and then small to large and values for cumulative area or number, richness and abundance calculated. We identified a total of 162 bird species during the study. There was no relationship between either patch area or number of patches and either species richness or abundance of birds. Therefore, we could not support the theory of passive sampling, which suggests large patches host higher species richness than small patches. Perhaps, this is, because of the following observed phenomena: 1). Edge effect, as species from nearby matrices used the patches; 2). Habitat sampling, as species sampled several different patches; and 3). Spillover, as species moved from nearby large reserves, such as Kakum Conservation Area (KCA), to the patches. The patches together occupied 2 947 ha and, compared with KCA, this is a ratio of 1:12, but the ratio in terms of species richness is 2:3, suggesting that many small patches could host more species than one large patch of comparable size. Thus, small patches are valuable for the conservation of bird species, which calls for various conservation bodies and institutions to take measures towards protecting such patches.

我们通过调查24个森林斑块，使用状态数据评估小斑块在加纳海角海岸大都会鸟类保护中的作用。通过将斑块大小从大到小，然后从小到大排序，绘制累积的物种-面积和数量曲线，并计算出累积面积或数量，丰富度和丰度的值。在研究过程中，我们总共确定了162种鸟类。斑块面积或斑块数量与鸟类的物种丰富度或丰富度之间没有关系。因此，我们不能支持被动采样的理论，被动采样理论表明大斑块比小斑块具有更高的物种丰富度。也许是由于以下观察到的现象：1）。边缘效应，因为来自附近矩阵的物种使用了斑块；2）。栖息地采样 物种采样了几个不同的斑块；和3）。物种从附近的大型保护区（如卡库姆保护区（KCAum））移到斑块时发生溢出。这些斑块共占2 947公顷，与KCA相比，这是1:12的比率，但是物种丰富度的比率是2：3，这表明许多小斑块可以比一个较大的斑块容纳更多的物种尺寸。因此，小的斑块对于鸟类的保护非常有价值，这就要求各种保护机构和机构采取措施来保护这种斑块。这表明许多小斑块可能比一个大小相似的大斑块容纳更多的物种。因此，小的斑块对于鸟类的保护非常有价值，这就要求各种保护机构和机构采取措施来保护这种斑块。这表明许多小斑块可能比一个大小相似的大斑块容纳更多的物种。因此，小的斑块对于鸟类的保护非常有价值，这就要求各种保护机构和机构采取措施来保护这种斑块。