巻号一覧
41 巻 (1991)
- 3 号 p. 191-
- 2 号 p. 73-
- 1 号 p. 1-
前身誌
41 巻, 1 号
選択された号の論文の17件中1～17を表示しています
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原稿種別: 表紙
1991 年 41 巻 1 号 p. Cover1-
発行日: 1991/04/30
公開日: 2017/05/24
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原稿種別: 表紙
1991 年 41 巻 1 号 p. Cover2-
発行日: 1991/04/30
公開日: 2017/05/24
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原稿種別: 付録等
1991 年 41 巻 1 号 p. App1-
発行日: 1991/04/30
公開日: 2017/05/24
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服部 昭尚, 柳沢 康信原稿種別: 本文
1991 年 41 巻 1 号 p. 1-8
発行日: 1991/04/30
公開日: 2017/05/24
ジャーナル フリーSocial system of the anemonefish Amphiprion clarkii was studied for a 1-year period at a site where host anemones were abundant. This species is monogamous and protandrous, and pairs maintained a territory including several separated host anemones. Following removal of females from seven pairs, six of the widowed males remained in their territories, and paired with immigrant females within seven days. No sex change was observed. However, the seventh widowed male was expelled from his territory by two immigrant males, and while solitary and without a territory, changed sex. This individual subsequently obtained a new territory and paired with a solitary male, Within the study area sex change was observed in only four relatively small individuals ; three changed sex while solitary and one in a male-male pair. It was hypothesized that following the loss of a female from a pair, sex change of the widowed male was suppressed by neighbouring females which approached and controlled the male. Generally individual males which were free from the influence of neighbouring females became females.抄録全体を表示PDF形式でダウンロード (938K) -
辻 誠治原稿種別: 本文
1991 年 41 巻 1 号 p. 9-18
発行日: 1991/04/30
公開日: 2017/05/24
ジャーナル フリーRelationships between vegetation units of secondary forests of Quercus serrata and soil conditions were studied in Tokorozawa city, central Honshu, Japan. The forests were classified into 2 associations of Quercetum acutissimo-serratae, including 2 subassociations, and Castaneo-Quercetum serratae, with 2 subassociations and 4 variants. The soils of Quercetum acutissimoserratae were mainly Andosols, and those of Castaneo-Quercetum serratae, Brown forest soils. Clear differences in soil conditions were detected between the typical subassociation of Quercetum acutissimo-serratae and the variant of Acer crataegifolium of the typical subassociation of Castaneo-Quercetum serratae, these being integral parts of each association. Major differences were evident in depth of A horizon, pH and porosity. It was ascertained that Quercetum actissimo-serratae was distributed on soils with a deeper A horizon, higher humus content and higher pH values and porosity percentages than Castaneo-Quercetum serratae. These results suggest that such pedological physicochemical properties contribute to the differentiation of these associations in the secondary forests of Quercus serrata.抄録全体を表示PDF形式でダウンロード (1135K) -
松下 まり子原稿種別: 本文
1991 年 41 巻 1 号 p. 19-24
発行日: 1991/04/30
公開日: 2017/05/24
ジャーナル フリーA palynological study was made on the Holocene sediments of the Takagami lowland in Choshi Peninsula, Japan. The pollen diagram could be divided into four local fossil pollen assemblage zones : the CTG-I zone was characterized by Castanea, Quercus (Lepidobalanus) and Acer at high frequencies, CTG-II by Abies and Tsuga, CTG-III by Castanopsis and Quercus (Cyclobalanopsis), and CTG-IV by Pinus. The stratigraphical sequence of pollen in the core sediments showed that warm-temperate broad-leved deciduous forest had changed to warm-temperate coniferous forest at the early Johmon transgression, and was followed by lucidophyllous forest 5500 years ago after the hypsithermal age, and subsequently by pine forest 4500 years ago. A similar succession pattern of lucidophyllous forest was observed in the Kanto plains, but was not evident at several areas along the Pacific coast where Castanopsis forests were formed at the early Holocene (7500-8500 y.B.P.). These findings clearly show that the vegetation of the Takagami lowland was not influenced by the warm Kuroshio current during the Holocene.抄録全体を表示PDF形式でダウンロード (801K) -
工藤 岳原稿種別: 本文
1991 年 41 巻 1 号 p. 25-30
発行日: 1991/04/30
公開日: 2017/05/24
ジャーナル フリーLife-history of a pioneer plant species, Aconogonon weyrichii, was studied at two habitats, and open site and an alder-forest site by setting three quadrats (1×1m in each size) at the former and two at the latter, in Yufutsu Mire, northern Japan. At the open site, the majority of shoots, which developed in spring, were retained until early October. Shoot growth stopped in early June and flowering occurred from early June and flowering occurred from early July to early September. At the forest site shoots emerged densely in spring but shoot density gradually decreased with the decrease in ambient light intensity due to alder leaf emergence. From early June to early July, shoots grew rapidly and completely suppressed other forest-floor plants, but shoot longevity was shorter than that at open site. Flowering occurred simultaneously in early July, and flowering duration was shorter (about 60 days) than that at open site (80-90 days). Therefore, A. weyrichii growing at open site are considered to be adapted as "ruderals" whereas those growing at forest site are adapted as "competitors". Individuals transplanted from the open site to the forest population initially showed rapid growth but by late July had died due to shading. Individuals transplanted from the forest site to the open site showed a similar growth pattern and growth form to open site types. It is assumed that the observed between-site variation in A. weyrichii is and example of ecological plasticity.抄録全体を表示PDF形式でダウンロード (722K) -
石川 慎吾原稿種別: 本文
1991 年 41 巻 1 号 p. 31-43
発行日: 1991/04/30
公開日: 2017/05/24
ジャーナル フリーIn order to elucidate the vegetation dynamics on the bars of the alluvial fan of the Ibi River, central Japan, mapping of vegetation, community sampling and grain-size analysis of the sediments were made in both 1982 and 1986. Plant communities were divided roughly into two groups by relative height above water level of the respective habitat, either (a) growing along stream sides and on the abandoned channels at low level, or (b) on the higher parts of the bars. The communities of the former group are segregated from each other, have few successional relationships and often change their stand positions because of the high frequency of habitat destruction and construction by channel shift. Conversely, in the higher part group, several successional relationships exist. The Imperata community succeeds the Anaphalis community, which is regarded as an allogenic succession induced by the deposition of fine and medium sands. Autogenic succession due to competition can be also observed. The floodplain vegetation is composed of many types of community which are showing a mosaic distribution pattern on the bars. This overall pattern can be recognized as the vegetation fluctuating as a whole under the disturbances of the river.抄録全体を表示PDF形式でダウンロード (1586K) -
中静 透原稿種別: 本文
1991 年 41 巻 1 号 p. 45-53
発行日: 1991/04/30
公開日: 2017/05/24
ジャーナル フリーRecent topics on long-term and large scale studies in forest dynamics are reviewed, and the importance of such studies is emphasized. Many basic ecological phenomena require long-term studies for justification and validation. For example, parameters of tree population and community dynamics must be evaluated by evidence from long-term observation to clarify whether or not they are in equilibrium. The role of episodic events can also be elucidated through such studies. However, for a study to continue for a long period and yield meaningful results, it is essential that effort be organized and orchestrated well in advance. Monitoring in a reserved area is also recommended to obtain the background data and to perceive any changes in environment.抄録全体を表示PDF形式でダウンロード (1108K) -
小川 房人原稿種別: 雑録
1991 年 41 巻 1 号 p. 55-65
発行日: 1991/04/30
公開日: 2017/05/24
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林 一六原稿種別: Article
1991 年 41 巻 1 号 p. 66-
発行日: 1991/04/30
公開日: 2017/05/24
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原稿種別: 付録等
1991 年 41 巻 1 号 p. 67-71
発行日: 1991/04/30
公開日: 2017/05/24
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原稿種別: 付録等
1991 年 41 巻 1 号 p. i-
発行日: 1991/04/30
公開日: 2017/05/24
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原稿種別: 目次
1991 年 41 巻 1 号 p. a-b
発行日: 1991/04/30
公開日: 2017/05/24
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原稿種別: 付録等
1991 年 41 巻 1 号 p. App2-
発行日: 1991/04/30
公開日: 2017/05/24
ジャーナル フリーPDF形式でダウンロード (68K) -
原稿種別: 表紙
1991 年 41 巻 1 号 p. Cover3-
発行日: 1991/04/30
公開日: 2017/05/24
ジャーナル フリーPDF形式でダウンロード (37K) -
原稿種別: 表紙
1991 年 41 巻 1 号 p. Cover4-
発行日: 1991/04/30
公開日: 2017/05/24
ジャーナル フリーPDF形式でダウンロード (37K)
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