著者

福田 秀志 FUKUDA Hideshi

出版者

名古屋大学農学部付属演習林

雑誌

名古屋大学森林科学研究 (ISSN:13442457)

巻号頁・発行日

no.16, pp.23-73, 1997-12

被引用文献数

12

---

農林水産研究情報センターで作成したPDFファイルを使用している。

著者

Hosokawa Robert Tuyoshi Yamamoto Hiroyuki Rochadelli Robert KLOCK Umberto REICHER Fany BOCHICCHIO Renato

出版者

名古屋大学農学部附属演習林

雑誌

名古屋大学森林科学研究 (ISSN:13442457)

巻号頁・発行日

no.21, pp.9-18, 2002-12

---

The Brazilian Ministry of Science and Technology (MCT) / National Council for Science and Technological Development (CNPq) financed the research project "Identification and Quantification of the Main Chemical Components of Mimosa scabrella Benthan, related to Forest Management Parameters". One of the objectives of the study was to determine the dynamics and structure of carbon fixation in reforestation, quantitatively and qualitatively. It examined permanent carbon storage in living trees using conventional reforestation practices aimed at producing diverse traditional products. The carbon density decreased with the diameter class of the stands : the carbon density in non-dominant trees was 310 kg/㎥, while it was 280 kg/㎥ in dominant trees. The production function for carbon assimilation C (ton/ha) was given by the model : C=I^2/(0.154397-0.011314×I+0.026268×I^2),where I is stand age (years). This permitted calculation of the productive structure. For continuous production, in the optimized regime, the forest in 30 rural farms should be divided into four age classes, each with the same area of production (167.84 ha) ; this would maintain a permanent stock of 13, 131 tons of carbon in the living population of Mimosa scabrella.農林水産研究情報センターで作成したPDFファイルを使用している。

著者

村瀬 香 MURASE Kaori

出版者

名古屋大学農学部附属演習林

雑誌

名古屋大学森林科学研究 (ISSN:13442457)

巻号頁・発行日

vol.22, pp.27-47, 2003-12

---

特定のアリ種に巣場所と栄養体を提供する代わりに植食者からの防衛をその共生アリに委ねている。東南アジア熱帯に分布するオオバギ属のアリ植物の4種、M.winkleri, M.trachyphylla, M.beccariana, M.bancana を対象に、どのような生態学的要因がアリ植物-共生アリ間の種の組み合わせの特異性を高めているのかということについて実証的に明らかにするために本研究は行われた。これら4種が分布している、マレーシア国サラワク州ランビルヒルズ国立公園とその近隣の二次林において、すべての観察・実験が行われた。In the tropics, many species of plants have mutualistic symbiosis with ants. The myrmecophytism is a typical mutualism between plants(myrmecophytes) and ants. Macaranga (Euphorbiaceae) is a tree genus of approximately 280 species, and includes many obligate myrmecophytic species. Macaranga myrmecophytes provide nest sites and food (food bodies) for their symbiont ants; in turn, the plant-ants protect their host plants from herbivores and clinging vines. One species of Macaranga myrmecophyte has a symbiotic relationship exclusively with only one or two ant species that are specialized to colonize the myrmecophyte or a few Macaranga species, including it. In some localities, multiple Macaranga myrmecophytic species coexist in the same microhabitat ; the spatial distributions of mature trees of such sympatric Macaranga species are highly overlapped at a microhabitat scale. However, the species-specificity in the partnership of the Macaranga-Crematogaster myrmecophytism has been highly maintained there. In this study, first, we examined the mechanisms that maintained such high species-specificity in Macaranga-Crematogaster myrmecophytism. As a key process that is involved in the mechanisms, we focused on settling-plant selection of the partner Macaranga seedlings by single foundress Crematogaster. The field observation showed that foundress queens are able to select correctly their partner plant species, and thus that species-specificity is consequently through the settling-plant selection. However, a number of Macaranga myrmecophytes were observed to be settled by foundress queens of non-partner ants, which settled into stem internodes of Macaranga seedings of sympatric Macaranga myrmecophytes species in the field. This means that settling-plant selection by foundress queen is insufficient to maintain the high species-specificity. Therefore, we hypothesized that the higher mortality in ant colonies and plants that are colonized by the ant species that are not specific to the plants might complementarily maintain the species-specificity. Second, to test the hypothe sis, we experimantally swapped the partner species of symbiont ants between the three Macaranga myrmecophyte species and monitored the survival rates of the plants and ant colonies. The results support the hypothesis. When queens of a ant species that is non-specific to a plant species were forced to colonize the seedlings of the plant, the mortality rates were significantly higher than those when they colonized seedlings of the other plant species to which the ant species is specialized. Third, to examine the intraspecific variation in the status of the ant-plant symbiosis among microhabitats of different light conditions, we investigated the species composition of nesting ants and the herbivory damage on M.bancana saplings by field observation and sampling in the primary and secondary forests in Sarawak. In addition, the effectiveness of non-ant (physical and chemical) defenses were estimated by feeding the larvae of a polyphagous lepidopteran with M.bancana leaves from saplings in the two types of forests. The results suggest that the symbiosis between ants and M.bancana is looser and the non-ant-defenses are stronger in secondary forests, where light is more intense, than in primary forests.

著者

田中 美江 柴田 叡弌

出版者

名古屋大学大学院生命農学研究科附属演習林

雑誌

名古屋大学森林科学研究 (ISSN:13442457)

巻号頁・発行日

vol.25, pp.1-6, 2006-12

---

人工林の構造の相違と野ネズミの生息状況との関係および人工林内での野ネズミの利用環境,すなわち微生息環境に対する選好性を明らかにし,これらを野ネズミの格間で比較した.捕獲された野ネズミはアカネズミ,ヒメネズミ,およびスミスネズミであった.アカネズミは森林構造の相違に関わらず生息し,さらにその中で様々な微生息環境を利用していた.ヒメネズミは森林構造の相違に関わらず生息していたが,人工林内において倒木の多い場所などを高頻度で利用していたOスミスネズミは沢沿いの調査区のみで捕獲され,地表堆積物の豊富な環境を高頻度で利用していたoLたがって,人工林における野ネズミの生息条件およびその中での微生息環境に対する選好性は種によって異なると推察された。

著者

只木 良也 平野 綾子 参鍋 秀樹 HIRANO Ayako 参鍋 秀樹 SAN-NABE Hideki 河口 順子 KAWAGUCHI Junko 平泉 智子 HIRAIZUMI Tomoko 星野 大介 HOSHINO Daisuke

出版者

名古屋大学農学部付属演習林

雑誌

名古屋大学森林科学研究 (ISSN:13442457)

巻号頁・発行日

no.23, pp.9-13, 2004-12

---

農林水産研究情報センターで作成したPDFファイルを使用している。