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61.
62.
The volatilization of mercuric chloride (HgCl2) and methyl mercuric chloride (CH3HgCl) by the 45 strains (35 Pseudoalteromonas sp., 2 Vibrio sp., 1 Aeromonas sp., and 7 unclassified) of the most mercury-resistant bacteria from Minamata Bay seawater was examined in various physiological conditions. The bacteria could grow and volatilize HgCl2 in the liquid medium containing 1-10% NaCl. Two Pseudoalteromonas strains could grow and volatilize HgCl2 at pH levels ranging from 5.0 to 10.0. The resting cells of 43 strains could volatilize HgCl2 at concentrations ranging from 30 to 68% after 1-h incubation at 30vv°C. The resting cells of 41 strains could volatilize CH3HgCl at concentrations ranging from 13 to 88% after 1-h incubation at 30vv°C. Ninety-two percent of mercury was removed from the phosphate buffer containing 0.1 7g/ml by a resting cell of Pseudoalteromonas strain H-4 after 30-min incubation at 30vv°C. We were able to screen the special bacteria, which could volatilize mercury compounds at a high rate in various physiological conditions, for the purpose of developing mercury removal methods using bacteria. 相似文献
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64.
Masahisa Nakamura 《生态毒理学报》2001,23(1)
Biwa湖 Yodo河水系为主要的居民中心及其周围的市政机构提供城市用水和工业用水 .它也提供农业用水,主要在 Biwa湖排水区域 .该水系服务的人口总数约为 1400万人 .
这个水系构成了 Keihanshin工业区的主要部分(按照字面上是指京都、大阪和神户),这是一个以沿大阪海湾-濑户内海的狭长地带发展为特征的一个区域 .Keihanshin的工业产值居日本的第三位,约占国内生产总值的 12.4% .一个复杂的供水网和废水网支持着高水平的工业和农业活动 . 相似文献
65.
Masahisa Nakamura 《生态毒理学报》2001,(2):34-35
Biwa湖-Yodo河水系为主要的居民中心及其周围的市政机构提供城市用水和工业用水 .它也提供农业用水,主要在 Biwa湖排水区域 .该水系服务的人口总数约为 1400万人 .
这个水系构成了 Keihanshin工业区的主要部分(按照字面上是指京都、大阪和神户),这是一个以沿大阪海湾-濑户内海的狭长地带发展为特征的一个区域 .Keihanshin的工业产值居日本的第三位,约占国内生产总值的 12.4% .一个复杂的供水网和废水网支持着高水平的工业和农业活动 .…… 相似文献
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A new method to single out the environmental factor limiting the life of any macrobenthic animal under stressed condition is proposed. The method is based on the assumption that the influence of each environmental factor on the life of a species can be expressed by an S-shaped function having lethal, limiting and non-limiting ranges, and the combined effect of several environmental factors is expressed by a multiple of these functions. To single out a lethal factor, we used the cumulative curve of abundance arranged in the order of each environmental factor. Comparison of these curves enables us to identify the most effective environmental factor limiting the life of a particular species and determine its effective range. Determination can be made from a single field observation without recourse to specially prepared experimental data if a sufficiently extensive survey was made in a field observation. The method was applied to the field data obtained from 248 stations at Lake Shinji, Japan, in the summer of 1982. 相似文献
69.
This paper investigates the impacts of Tropical Cyclone Winston (2016) on rural Indo-Fijians and their response to the devastation. Studies have previously examined how rural communities in Pacific Island countries respond to severe climatic events, arguing that traditional knowledge of the climate, together with indigenous techniques, contribute substantially to recovery from a disaster. Strong communal bonds have also been identified as an influencing factor. Disaster risk reduction frameworks often assume the availability of such knowledge and capital. Yet, little research has been done on how minority groups with limited access to such knowledge and capital cope with disaster-related damage. The current study shows that rural Indo-Fijians responded to the consequences of Tropical Cyclone Winston differently to indigenous Fijians, owing to relatively limited access to traditional awareness of the climate, communal labour sharing, and intra- and/or inter-community networks. The findings point to the necessity to implement a more inclusive disaster risk reduction framework. 相似文献
70.
Spatiotemporal recruitment patterns of scleractinian corals were investigated around Iriomote Island, Ryukyu Archipelago,
Japan, in relation to adult coral cover in 2005 and 2006. Although almost all corals were broadcasting spawners, the relationship
between recruitment and adult coral cover differed among coral families (Acroporidae, Poritidae, and Pocilloporidae), likely
due to differences in embryonic development time. For spawning pocilloporid corals, whose larvae develop relatively more rapidly,
recruitment was higher at sites where adult coral cover was higher. In contrast, recruitment was not related to adult coral
cover in acroporid and poritid corals, whose embryonic development times were relatively slow. Moreover, recruitment of acroporid
corals varied between years, and recruitment was greater at leeward compared to windward reefs for a few days after spawning.
These results suggest that embryonic development time and wind-driven surface currents affect larval dispersal and subsequent
recruitment patterns at a local scale. Based on embryonic development time, some spawning corals are more likely to have higher
rates of self-seeding than others. Our results predict that among spawning corals, local populations of acroporid and poritid
corals, whose larvae potentially disperse over long distances and recruit in neighboring reefs, are more resilient to local
disturbances than those of pocilloporid corals, whose recruitment relies upon local stock. 相似文献