滨海电厂温排水温升对红树林分布扩散的影响OA
Effects of Temperature Rise of Thermal Effluent from a Coastal Power Plant on the Distribution and Spread of Mangroves
温度是决定红树植物地理分布的关键因素之一,但关于滨海电厂温排水温升对红树林分布扩散的影响尚不明确.本研究运用参照对比法和基线对比法,通过调查广西防城港核电厂三期工程5、6号机组温排水温升1.0℃范围内红树林区(以下简称为"影响林区")和金鼓江范围内红树林区(以下简称为"参照林区")红树林历史动态分布,分析其景观格局变化、典型红树林斑块面积变化、驱动因素及其影响程度,分析预测未来广西防城港核电厂三期工程5、6号机组投入运营后,温排水温升对参照林区红树林分布扩散的影响.结果表明,参照林区现有红树林165.64 hm2,分别分布在<0.5、0.5-1.0、1.0-2.0、2.0-3.0和3.0-4.0℃温升区.2007-2022年,红树林面积净减24.93 hm2,变化率-13.08%,年均变化率-0.87%.填海造地等人为活动造成参照林区红树林较大面积损失,但在各温升区均有不同程度的红树林自然增长扩散.影响林区内的红树林面积为28.31 hm2,分布在1.0-2.0、2.0-3.0℃温升区的红树林面积分别为26.85、1.46 hm2.2007-2022年影响林区红树林面积先减少后增加,自然增长4.49 hm2,填海造地等人为活动导致红树林面积减少1.72 hm2,净增2.92 hm2,变化率11.50%,年均变化率0.77%.预测广西防城港核电厂三期工程投入运营后温排水不会对1.0℃温升范围内红树林的自然增长扩散产生负面影响.本研究可为今后评价、论证滨海电厂对红树林的影响及相关研究提供重要参考.
Temperature is a major environmental determinant of the geographical distribution of mangrove plants,while the effects of temperature rise of thermal effluent from a coastal power plant on the distribution and spread of mangroves remain unclear.The reference comparison method and baseline comparison method were employed to investigate the historical dynamic distribution of mangroves in the impacted forest area and the reference forest area.The changes in landscape pattern,typical mangrove patches,driving factors and the influencing degree were analyzed.Furthermore,the effects of temperature rise of thermal effluent after operation of No.5 and No.6 sets of the third phase of the Guangxi Fangchenggang Nuclear Power Plant in the future on the distribution and spread of mangroves in the reference forest area were predicted.The re-sults showed that the existing mangrove area in the reference forest area was 165.64 hm2,distributed in the temperature rise zones of<0.5,0.5-1.0,1.0-2.0,2.0-3.0 and 3.0-4.0℃.During 2007-2022,the net loss of mangrove area was 24.93 hm2,with a change rate of-13.08%and an annual average of-0.87%.Anthropogenic activities such as land reclamation caused a larger loss of mangrove area in the reference forest area,while there were different degrees of natural mangrove spread in all temperature rise zones.The man-grove area in the impacted forest area was 28.31 hm2,and those distributed in the 1.0-2.0 and 2.0-3.0℃temperature rise zone were 26.85 hm2 and 1.46 hm2,respectively.During 2007-2022,the mangrove area in the impacted forest area first decreased and then increased,with a natural increase of 4.49 hm2 and a decrease of 1.72 hm2 due to anthropogenic activities such as land reclamation.The net increase was 2.92 hm2,with a change rate of 11.50%and an annual average of 0.77%.It was predicted that the thermal effluent after the operation of the third phase of the Guangxi Fangchenggang Nuclear Power Plant would not have negative effect on the natural growth and spread of mangroves within the 1.0℃temperature rise zones.The findings provide a reference for the future evaluation and demonstration of the effects of coastal power plants on man-groves and related research.
李梦;莫珍妮;赖廷和;何斌源;黄中坚;马日宇
广西壮族自治区海洋研究院,广西 南宁 530022广西壮族自治区海洋研究院,广西 南宁 530022广西壮族自治区海洋研究院,广西 南宁 530022广西壮族自治区海洋研究院,广西 南宁 530022广西壮族自治区海洋研究院,广西 南宁 530022广西壮族自治区海洋研究院,广西 南宁 530022
海洋科学
滨海电厂温排水红树林分布
coastal power plantthermal effluentmangrovedistribution
《广西科学》 2026 (1)
35-44,10
广西重点研发计划项目(桂科AB21076016,桂科AB21220064)资助.
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