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The study evaluated the impact of crude oil pollution on natural regeneration of plant species in a major oil-producing community in the Niger Delta region of Nigeria. Three sites—unpolluted site(US), polluted and untreated site(PUS), and polluted and treated site(PTS)—were purposively chosen for the study. The seedling emergence method was used to evaluate soil seed banks in the various sites at two depths, 0 to 10 cm and 10 to 20 cm. Woody-plant species richness, abundance, and diversity were higher in the US seed bank than in the PUS and PTS seed banks. The highest number of non-woody plants was observed in the US, followed by the PTS, and then the PUS. Both species richness and diversity of non-woody plants were highest at the US, followed by the PUS, and lowest in the PTS. Woody species in the US seed bank were 87.5% and 80% dissimilar with those of the PUS and PTS at 0–10 cm and 10–20 cm respectively. No variation was observed between woody species in the PUS and PTS seed banks. Non-woody species at 0-10 cm US seed bank were 73.08% dissimilar with those of PUS at the two soil depths and 81.48/88.46% dissimilar with those of the 0–10/10–20 cm of the PTS respectively. At 10–20 cm, non-woody species of the US were 69.66% dissimilar with those from each of the two soil depths in PUS; and 73.91/81.82% dissimilar with those of 0–10/10–20 cm of the PTS respectively. Non-woody species variation between the PUS and PTS was higher at 10–20 cm than 0–10 cm. The poor seed bank attributes at the polluted sites demonstrates that crude oil pollution negatively affected the natural regeneration potential of the native flora because soil seed banks serve as the building blocks for plant succession. Thorough remediation and enrichment planting are recommended to support the recovery process of vegetation in the polluted areas. 相似文献
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尼日利亚木薯业发展与研究 总被引：1，自引：0，他引：1
濮文辉 《世界热带农业信息》2007,(7):6-8
尼日利亚位于西非的东南部，国土面积达92万多平方千米。南部濒临几内亚湾和贝宁湾，东部和东南部与喀麦隆相接壤，东北隔乍得湖与乍得相望，北与尼日尔相邻，西与贝宁相邻。地势北高南低，沿海为宽约80公里的带状平原；南部为低山丘陵，大部分地区海拔为200～500米；中部为尼日尔-贝努埃河谷地；北部为豪萨兰高地，面积占全国面积的1／4多，平均海拔为900米； 相似文献
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红宝石鱼（Hemichromis bimaculatus，Gill，1862）属慈鲷科（又称丽鱼科，口孵鱼科）（Cichlidae），是一种体型中等的淡水热带观赏鱼，原产于非洲的刚果河、尼罗河、尼日尔河等水域。该鱼体色鲜艳，特别是雌鱼在繁殖期间的婚姻色更为艳丽，加之容易饲养和繁殖，所以有不少水族爱好者喜欢饲养它。红宝石除供观赏外，也被作为一种试验动物来饲养，国外有一些科学家曾用它来研究鱼类生理学。 相似文献
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