Factors to change two alternative systems, macrophyte-rich macrophyte-free in shallow lakes

改变两种替代系统的因素：浅湖中富含水生植物和无水生植物

• 批准号: 13640639
• 负责人: TAKAMURA Noriko
• 金额: $ 1.54万
• 依托单位: National Institute for Environmental Studies
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2001
• 资助国家: 日本
• 起止时间: 2001 至 2002
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-13640639/
• 关键词: biodiversity; ecosystem; stability; lake; catastrophe; ecosystem service; ecosystem management; Aquatic macrophytes; 湖泥

We investigated aquatic macrophytes, water quality, and phytoplankton biomass and species composition in three shallow lakes with different levels of vegetation coverage and nutrient concentrations in Kushiro Moor during August 2000. Trapa japonica can live at a wide range of nutrient levels. It forms an environment with a steeper extinction of light, higher concentrations of dissolved organic carbon (DOC), lower concentrations of dissolved oxygen (DO) near the bottom, and lower concentrations of nitrate + nitrite, and soluble reactive phosphorus (SRP). The pH was much higher In a Polygonum amphibium community, and the DO near the bottom did not drop. The relationship between chlorophyll a and the limiting nutrient (TP when TN : TP 【greater than or equal】 10, and TN/10 when TN : TP < 10) significantly differed between lakes with and without submerged vegetation. The chlorophyll a concentrations at a given nutrient level were significantly lower in water with submerged macrophytes than in water without them. Correspondence analysis showed that the difference in phytoplankton community structure among sites is due largely to the presence or absence of submerged macrophytes, and the ordination of phytoplankton species in the lakes with submerged macrophytes is best explained by environmental gradients of TN, chlorophyll, pH, and SRP

2000年8月，我们对钏路沼泽三个不同植被覆盖度和养分浓度的浅水湖泊的水生大型植物、水质、浮游植物生物量和物种组成进行了调查。菱角可以在广泛的养分水平下生存，形成了一个环境。光消光更陡，溶解有机碳 (DOC) 浓度更高，底部附近溶解氧 (DO) 浓度更低，硝酸盐浓度更低 +两栖蓼群落的 pH 值较高，且底部附近的 DO 没有下降。等于】10，当 TN : TP < 10 时，TN/10）在给定养分水平下，有和没有沉水植被的湖泊之间叶绿素 a 浓度存在显着差异。对应分析表明，不同地点浮游植物群落结构的差异很大程度上是由于有沉水植物的存在或不存在造成的，有沉水植物的湖泊中浮游植物的物种排序是不同的。最好的解释是 TN、叶绿素、pH 和 SRP 的环境梯度

项目成果

Takamura, N., Kadono,Y., Fukushima, M, Nakagawa, M. and Kim, BH.: "Effects of aquatic macrophytes on water quality and phytoplankton community in shallow lakes"Ecological Research. 18 (in press).

Takamura, N.、Kadono,Y.、Fukushima, M、Nakakawa, M. 和 Kim, BH.：“水生大型植物对浅水湖泊水质和浮游植物群落的影响”生态研究。

高村典子: "ため池の保全を考える"水環境学会. 26・5(印刷中). (2003)

高村纪子：“关于水库保护的思考”水环境协会26・5（出版中）。

Makino, W., Mikami, H., Katano, N., Nakagawa, M. and Takamura, N.: "Biological productivity of Lake Towada, a north temperate, oligotrophic kokanee-fishery lake"Limnology. (in press).

Makino, W.、Mikami, H.、Katano, N.、Nakakawa, M. 和 Takamura, N.：“北温带寡营养 kokanee 渔业湖十和田湖的生物生产力”湖沼学。

Makino, W., Kato, H., Takamura, H., Mizutani, N., Katano, N. and Mikami, H.: "Did chironomid emergence release Daphnia from fish predation and lead to a Daphnia-driven clear-water phase in lake Towada, Japan?"Hydrobiologia. 442. 309-317 (2001)

Makino, W.、Kato, H.、Takamura, H.、Mizutani, N.、Katano, N. 和 Mikami, H.：“摇蚊的出现是否使水蚤从鱼类捕食中释放出来，并导致水蚤驱动的清水阶段

Makino, W., Mikami, H., Katano, N., Nakagawa, M., Takamura, N.: "Biological productivity of Lake Towada, a north temperate, oligotrophic kokanee-fishery lake"Limnology. 4(印刷中). (2003)

Makino, W.、Mikami, H.、Katano, N.、Nakakawa, M.、Takamura, N.：“北温带寡营养科卡尼渔业湖十和田湖的生物生产力”Limnology 4（出版中）。 (2003)