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首页> 外文期刊>Estuarine Coastal and Shelf Science >Comparison of flooding-tolerance in four mangrove species in a diurnal tidal zone in the Beibu Gulf
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Comparison of flooding-tolerance in four mangrove species in a diurnal tidal zone in the Beibu Gulf

机译：北部湾日潮区四种红树林物种的耐洪性比较

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摘要

The flood tolerance of four mangrove species, Aegiceras corniculatum (L.) Blanco (AC), Avicennia marina (Forsk.) Vierh. (Am), Bruguiera gymnorrhiza (L.) Savigny (Bg) and Rhizophora stylosa Griff. (Rs) was examined in a field trial conducted from August 2004 until August 2005 in a diurnal tidal zone in Yingluo Bay, Guangxi province, China. In a section of tidal flat, three replicate artificial platforms were constructed for seedling cultivation. Eight different tidal flat elevation (TFE) treatments were created on each platform. After one year of cultivation under the TFE treatments, the survival rate and growth parameters of seedlings were measured. Seedlings of A. corniculatum and A. marina seedlings survived all treatments. The survival rate of B. gymnorrhiza and R. stylosa seedlings, however, decreased sharply as the TFE fell; in any treatment, fewer B. gymnorrhiza seedlings survived than R. stylosa seedlings. Stem elongation in A. corniculatum and A. marina seedlings was significantly increased by lower TFEs. Lower TFE treatments also increased stem heights in B. gymnorrhiza and R. stylosa seedlings; however, growth was significantly higher as TFE increased. Leaf number, leaf conservation rate and leaf area per seedling changed relatively little among treatments in A. corniculatum and A. marina seedlings, while these three indexes in B. gymnorrhiza and R. stylosa seedlings all decreased dramatically with decreasing TFE. A. marina seedlings reached a higher neonatal biomass at lower TFE treatments, whereas A. corniculatum seedlings attained a higher biomass under moderate TFEs. In contrast, B. gymnorrhiza and R. stylosa seedlings accumulated more biomass in the higher TFEs habitats. Biomass partitioning among the components of both A. corniculatum and A. marina seedlings changed evenly; however, A. corniculatum accumulated more biomass in the leaf while A. marina accumulated more in the stem. The TFE treatments greatly influenced biomass partitioning in B. gymnorrhiza and R. stylosa seedlings, with a change from stem to leaf as the TFE increased. Generally speaking, the rank order of tolerance to flooding among these four mangrove species in the diurnal tidal zone was, from most to least tolerant, A. marina > A. corniculatum > R. stylosa > B. gymnorrhiza. This conclusion is consistent with the general pattern of natural mangrove species zonation along the Chinese coast in the Beibu Gulf. The critical tidal levels for afforestation with these four mangrove species are proposed.
机译：四种红树林物种（Aegiceras corniculatum（L.）Blanco（AC），Avicennia marina（Forsk。）Vierh）的耐洪能力。 （Am），Bruguiera Gymnorrhiza（L.）Savigny（Bg）和Rhizophora stylosa Griff。 2004年8月至2005年8月在中国广西省英罗湾的日潮区进行的田间试验中对（Rs）进行了研究。在潮滩的一部分中，构建了三个重复的人工平台用于幼苗种植。在每个平台上创建了八种不同的潮滩高程（TFE）处理。在TFE处理下培养一年后，测量幼苗的存活率和生长参数。所有处理均使A.corniculatum和A.marina幼苗存活。然而，随着TFE的降低，裸子叶芽孢杆菌和针状芽孢杆菌的成活率急剧下降。在任何处理中，裸露的裸子叶枯萎病幼苗比裸心线虫幼苗少。较低的TFEs显着增加了A.corniculatum和A.marina幼苗的茎伸长。较低的TFE处理也增加了裸子叶枯草芽孢杆菌和针状芽孢杆菌幼苗的茎高。但是，随着TFE的增加，增长明显更高。在A.corniculatum和A.marina幼苗中，处理后的叶片数，叶片保存率和每片幼苗的叶面积变化相对较小，而B.gymrrhizaiza和R.stylosa幼苗的这三个指数均随着TFE的降低而显着降低。在较低的TFE处理下，滨海曲霉幼苗达到了较高的新生儿生物量，而在中等的TFE处理下，山茱。幼苗获得了较高的生物量。相比之下，裸子叶芽孢杆菌和针状芽孢杆菌幼苗在较高的TFEs生境中积累了更多的生物量。山茱。和滨海种苗成分之间的生物量分配变化均匀；然而，A。corniculatum在叶片中积累了更多的生物量，而A. marina在茎中积累了更多的生物量。 TFE处理极大地影响了裸子草和针茅幼苗生物量的分配，随着TFE的增加，茎叶之间也发生了变化。一般而言，在昼间潮汐带这四种红树林物种中，对洪水的耐受性的等级顺序是，从最大到最小的耐受性是：滨海曲霉>滨海曲霉>针状杜鹃>裸子藻。这一结论与北部湾中国沿岸的天然红树林物种区划的总体模式是一致的。提出了用这四种红树林造林的临界潮汐水平。

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