Herbivory and seedling performance in a fragmented temperate forest of Chile

Forest fragmentation alters plant-animal interactions, including herbivory. Relying manipulative experiments, we test if the reduction in insect herbivory associated with forest fragmentation translates into increased seedling growth and survival of three tree common species (Aristotelia chilensis, Cryptocarya alba and Persea lingue) in forest fragments and continuous forests in coastal Maulino forest, central Chile. Furthermore, we test if after protecting seedlings from herbivorous insects, plant performance is increased regardless of forest fragmentation. Nursery grown seedlings were transplanted into four forest fragments and a continuous forest during 2002. Insects, important herbivores in this forest, were excluded from half the seedlings by repeated applications of insecticides. Compared to continuous forests, in forest fragments, herbivory was reduced in all three species, seedling growth was greater in A. chilensis and C. alba but not in P. lingue, and survivorship was unaffected by herbivory or fragmentation in all three species. Protecting seedlings from insects reduced herbivory in the continuous forest to similar levels attained in the forest fragments. No change in herbivory results from by protecting seedlings in forest fragments. These results confirm that insects are important herbivores in the Maulino forest and also support the hypothesis that fragmentation can have strong indirect effects on plant communities as mediated through trophic interactions.     

Structure of a unique inland mangrove forest assemblage in fossil lagoons on the Caribbean Coast of Mexico

Scrub mangrove wetlands colonize the intertidal zone of fossil lagoons located in carbonate continental margins along the Yucatan Peninsula of Mexico. These unique ecological types were investigated in October, 1994, by locating transects in several mangrove forests along the Caribbean coast of the peninsula. Four species of mangrove occurred at these sites including Rhizophora mangle, Avicennia germinans, Laguncularia racemosa, Conocarpus erecta. This is one of the first examples of a species rich scrub forest. The mangroves fell into three height categories: short scrub less than 1.5 m, tall scrub to 3.0 m, and basin forests between 4.5 and 6 m. Average height, diameter (dbh), basal area, and complexity index generally increased from short scrub to basin forests. Basal area, ranged from 0.16 m² ha^–1 in a short scrub forest intermixed with Cladium jamaicense to 12.9 m² ha^–1 in a basin forest. Density ranged from 1520 trees ha^–1 to over 25,000 trees ha^–1 in a short scrub forest dominated by R. mangle. The complexity index ranged from 0.01 to 8.3. Height, dbh, basal area, and complexity index were positively related. A number of trees were growing as sprouts from larger downed trunks, suggesting that hurricanes, such as Gilbert that occurred in 1988, are important in controlling the structure of these forests. These forests appear isolated from the sea, but are influenced by groundwater exchange occurring at the land-margin zone.     

Recovery of species richness and conservation of native Atlantic forest trees in the cacao plantations of southern Bahia in Brazil

The Atlantic forests of southern Bahia in Brazil present great species richness and a high degree of endemism. A large part of these native forests were transformed into cacao plantations in an agroforestry system known locally as cabrucas, where native trees were culled and cacao was planted under the shade of remaining trees. The present study analyzed the influence of time of implantation (age) and time of abandonment of management practices on tree species diversity of cabruca plantations to evaluate the capacity for conservation and recovery of species richness of native Atlantic Forest trees in cabrucas. Phytosociological surveys were conducted in five cabrucas with different conditions of age and state of abandonment. All trees, including hemiepiphytes and excluding the cacao plants, with a minimum stem diameter of 10 cm at breast height, were surveyed within a 3-ha sampling area in each plantation. A total of 2514 individual trees belonging to 293 species and 52 families were recorded in the five cabrucas. The Shannon diversity index varied from 3.31 to 4.22 among the cabrucas and was positively correlated with the time of abandonment (r = 0.97). The new cabrucas showed the highest values of estimated total richness (Chao) and the highest proportion of late successional species than the old ones. All areas preserved a very high proportion of native forest species while the three old cabrucas showed a higher proportion of exotic species than the two new ones. Thus the exotic species seem to replace more of the native species in the long run because of management practices and local preferences. The cabrucas presented also a high capacity for the regeneration of tree species richness after abandonment. Simple alterations in management practices could improve the recruitment of late successional species in these areas. Economic incentives may be necessary for the farmers to adopt management practices to retain native species which bring no economic returns.     

黑河天涝池流域典型林分生态水文化学特征

采集了黑河天涝池流域典型林分林外雨、穿透雨、树干径流和枯透水,并检测水体pH值和12种离子(K~+、Ca~(2+)、Na~+、Mg~(2+)、NH_4~+、Cu~(2+)、Zn~(2+)、Pb~(2+)、Cd~(2+)、Cl~-、SO_4~(2-)、NO_3~3)的质量浓度。结果表明:天涝池流域大气降水pH均值为7.74,呈碱性,降水中离子绝对质量浓度较低,最高的是NO_3~-,质量浓度为1.1111 mg/L,最低的为Na~+,质量浓度为0.0108 mg/L;两种林分冠层有降低降雨pH值的作用,青海云杉林冠层对NH_4~+有升高作用,祁连圆柏林冠层对NH_4~+有降低作用,两种林冠层对NO_3~-和Cu~(2+)质量浓度有降低作用,对其它离子质量浓度均表现为升高作用;两种林分树干径流有提高穿透雨pH值的作用,与穿透雨相比,两种林分树干径流中阴离子均有升高,圆柏树干径流中所有阳离子质量浓度均有下降,云杉树干径流中Ca~(2+)、K~+、Mg~(2+)和Na~+减少,NH_4~+和Cu~(2+)增加;典型林分枯透水有提升穿透雨pH值的作用,与穿透雨相比,两种林分枯透水中阴离子质量浓度均有升高,云杉枯透水各阳离子均有降低,圆柏枯透水中Ca~(2+)、K~+和Mg~(2+)质量浓度升高,NH_4~+、Na~+和Cu~(2+)质量浓度下降;在采集的所有样本中,Pb~(2+)和Cd~(2+)均未检出,而Zn~(2+)仅在云杉树干径流中检出。     

Diversity and structure of shrew communities in montane forests of southeast Kenya

As a step towards setting conservation priorities for declining moist forests in southeast Kenya, we assessed for small mammal diversity and distribution. These habitats are under severe pressure due to increased demand an forests products and arable land, yet there is a dearth of information an impacts an biodiversity. Over an eight-month period, we used a combination of box and pitfall traps with drift fences to study 13 forest fragments in five geographic areas ranging between 3°28′−4°10′ S and 38°28′−39°2b′ E. We recorded 12 species including 10 soricids and two macroscelids in 31440 trap nights. Diversity estimates using rarefaction method indicate a species richness of 12, consistent with our collection. There were six unique species, each limited in distribution to one forest fragment. Our record of Crocidura cf. selina in Kyulu Hills is the first outside Mabira forest in Uganda where it is considered endemic and endangered. We also report the first record of C. fuscomurina in Kenya, white those of C. Luna and Suncus megalura are first in the southeast of the country. By providing new ranges to four species, our study is of significance to the biogeography and conservation of forest small mammals in the region.     

Forest eternal? Endemic butterflies of the Bamenda highlands,Cameroon, avoid close‐canopy forest

The Gulf of Guinea Highlands, a centre of endemism and high conservation importance, represent the only large mountain system in West and Central Africa. We studied habitat use of three common endemic butterflies Colias electo manengoubensis, Bicyclus anisops and Mylothris jacksoni knutsoni, using time‐standardized surveys in four distinct habitats: close‐canopy forest, scrub and forest edges, bracken and grasslands. All three species avoided close‐canopy forests and bracken; the Colias preferring grassland, whereas Bicyclus and Mylothris scrub and forest edges. Ordination analyses of surrounding habitats indicated that all three taxa required heterogeneous landscape mosaics. We argue that the life history traits of taxa with limited geographic distribution may reflect past habitat conditions within their ranges, and that these habitat preferences can indicate the continuous existence of mosaic of forest and nonforest habitats in the West African mountains. Such a landscape was probably maintained by climatic fluctuation and large herbivores, further modified by human impact. This conclusion is consistent with the palaeoenvironmental record and with the requirements of Afromontane endemics from other groups. Recent conservation activities focus on patches of continuous forests, but the mosaic landscapes are no less threatened by intensive agriculture, and should be included to protected areas.     

盐城沿海海堤林带柳莺属(Phylloscopus)鸟类秋季迁徙规律

江苏盐城沿海具有广阔的平原与湿地滩涂,但缺少自然林地。经过多年的防风林建设,沿海海堤逐渐形成了特有的、南北走向的条带林生境,为迁徙鸟类提供了通道和停歇地,是研究鸟类迁徙规律的理想地点。柳莺属鸟类个体小,野外种类识别难,其迁徙规律缺乏深入研究。分别于2018年和2019年两个秋季,采用雾网法对盐城沿海海堤林带柳莺属鸟类的迁徙规律进行研究。结果表明：两个秋季共捕获柳莺属鸟类8种608只,其中极北柳莺（Phylloscopus borealis）、冕柳莺（P. coronatus）、淡脚柳莺（P. tenellipes）和黄眉柳莺（P. inornatus）的捕获数量分别为245只、131只、107只和94只,占捕获总数量的95%,是秋季迁徙期的优势种。对优势种柳莺日捕获率进行比较：2019年极北柳莺的日捕获率显著高于淡脚柳莺和黄眉柳莺（U test,P<0.05）。对捕获数量随时间变化进行分析,4种柳莺都以集中在短时间内快速通过的迁徙策略穿越盐城沿海海堤林带,符合秋季小型雀形目鸟类迁徙采取时间最小化假说。不同种类的柳莺在通过盐城沿海海堤林带的时间顺序上存在显著差异（K-W test,P<0.05）,2018年和2019年均以黄眉柳莺通过最晚。随着时间的推移,四种柳莺的脂肪度都逐渐下降。繁殖地纬度的差异可能是导致4种柳莺通过盐城沿海海堤林带时间差异的原因。盐城沿海海堤林带为柳莺属等雀形目小型鸟类的迁徙提供了非常理想的迁徙通道,应当加强海堤林带在鸟类迁徙和保护中的作用研究。     

广州红锥-马占相思林物种组成与多样性研究

为了解广州市龙眼洞林场红锥(Castanopsis hystrix)-马占相思(Acacia mangium)阔叶混交林的群落结构,对其物种多样性进行了分析.结果表明,红锥-马占相思阔叶混交林的物种丰富度依次为乔木层>灌木层>草本层>层间植物层.乔木层的Simpson和Shannon-Wiener指数分别为0.945和...     

Conservation value of timber quality versus associated non-timber quality stands for understory diversity in Nothofagus forests

Conservation strategies of forested landscapes must consider biodiversity of the included site types, i.e. timber-quality forests and associated non-timber-quality stands. The objectives were to characterize forest overstory structure in timber-quality versus associated non-timber-quality stands; and to compare their understory communities. Six forest types were sampled in Nothofagus forests of Tierra del Fuego (Argentina): two timber-quality N. pumilio forests, and four associated non-timber-quality stands (edge, N. antarctica, wetlands and streamside forests). Overstory structure and understory vegetation (species richness, frequencies, cover and biomass) were characterized during spring and summer seasons. Analysis of variance and multivariates were carried out. Overstory structure differed across the site types, with higher tree size, canopy closure and tree volume in timber-quality stands. Fifty-one understory plant species were observed, but understory variables varied with site types, especially wetlands (highest native and exotic richness, cover and biomass, and 25% of exclusive species). Site types were grouped in three: N. antarctica stands, streamside stands and the other N. pumilio forests according to multivariate analysis. Forty three percent of plants were distributed in all site types, and all timber-quality forest understory species were present in some associated non-timber-quality stands. Timber-quality N. pumilio forests have a marginal value for understory conservation compared to associated non-timber-quality stands, because these last include all the plants observed in timber-quality forests and also possess many exclusive species. Therefore, protection of associated non-timber-quality stands during forest management planning could increase understory conservation at landscape level, and these could be better reserves of understory diversity than retentions of timber-quality stands.     

Vegetation of Kilimanjaro: hidden endemics and missing bamboo

Kilimanjaro has a large variety of forest types over an altitudinal range of 3000 m containing over 1200 vascular plant species. Montane Ocotea forests occur on the wet southern slope. Cassipourea and Juniperus forests grow on the dry northern slope. Subalpine Erica forests at 4100 m represent the highest elevation cloud forests in Africa. In contrast to this enormous biodiversity, the degree of endemism is low. However, forest relicts in the deepest valleys of the cultivated lower areas suggest that a rich forest flora inhabited Mt Kilimanjaro in the past, with restricted‐range species otherwise only known from the Eastern Arc mountains. The low degree of endemism on Kilimanjaro may result from destruction of lower altitude forest rather than the relatively young age of the mountain. Another feature of the forests of Kilimanjaro is the absence of a bamboo zone, which occurs on all other tall mountains in East Africa with a similarly high rainfall. Sinarundinaria alpina stands are favoured by elephants and buffaloes. On Kilimanjaro these megaherbivores occur on the northern slopes, where it is too dry for a large bamboo zone to develop. They are excluded from the wet southern slope forests by topography and humans, who have cultivated the foothills for at least 2000 years. This interplay of biotic and abiotic factors could explain not only the lack of a bamboo zone on Kilimanjaro but also offers possible explanations for the patterns of diversity and endemism. Kilimanjaro's forests can therefore serve as a striking example of the large and long‐lasting influence of both animals and humans on the African landscape.     

桥山栎林群落结构特征与物种多样性相关关系分析

为了解森林群落结构特征与物种多样性之间的相关关系,以黄土高原桥山林区典型麻栎纯林、麻栎阔叶混交林和麻栎油松混交林为研究对象,调查分析了群落结构特征,计算物种重要值及物种多样性,并进行了冗余分析,结果表明:(1)麻栎油松混交林主要以乔木层胸径、树高、枝下高等最高;麻栎阔叶混交林以灌木层盖度、地径、冠幅、高度等最高;麻栎纯林以草本地径、草本盖度及草本冠幅最高。(2) 3种类型林分乔木层重要值最高的均为麻栎(Quercus acutissima),灌木层为狼牙刺(Sophora viciifolia)、南蛇藤(Celastrus orbiculatus)、胡枝子(Lespedeza bicolor),草本层为苔草(Carex tristachya)。(3)麻栎油松混交林乔、灌层物种多样性较高,麻栎阔叶混交林以草本层物种多样性最高。(4)不同类型麻栎林群落结构特征与物种多样性关系有差异。松栎混交林中,对物种多样性影响最大的为乔木胸径、新稍长及灌木高度;麻栎阔叶混交林对物种多样性影响最大的为灌木层高度及冠幅;麻栎纯林中,对物种多样性影响最大的为乔木胸径。(5)麻栎油松混交林、麻栎阔叶混交林的胸径、树高、物种多样较麻栎纯林高,具有较高木材生产能力和生态防护功能,是未来森林经营培育的方向。     

Light, nutrients and the growth of herbaceous forest species

The herb layer of forests planted on former agricultural land often differs from that of old-growth forest. This study investigates if the expected increased nutrient availability in the shaded conditions of newly planted forests and the plasticity of the species to adjust their biomass allocation to different levels of light and nutrients help to explain these differences in the herb layers of the two forest types. In a greenhouse experiment biomass distribution and production of two species characteristic for the highly shaded forest floor, Circaea lutetiana and Mercurialis perennis, and two species more common in the forest-edge, Aegopodium podagraria and Impatiens parviflora were studied at different levels of light (2%, 8% and 66% of the full light level) and nutrients (30 and 300 kg N ha^–1 per year). The main factor affecting allocation and biomass production was light availability. Nutrient supply only had a significant effect at the higher light levels. Species were mainly plastic to changes in light and the two species from the forest floor showed to be more rigid in allocation pattern than the species from the forest-edge. So, although the species from the forest-edge were more plastic, they did not profit from the increased nutrient supply because the main factor affecting biomass distribution and production was light availability.     

Structure and dynamics of an ancient montane forest in coastal British Columbia

Old-growth forests are common in the snowy, montane environments of coastal western North America. To examine dynamics of a stand containing four canopy tree species (Abies amabilis, Chamaecyparis nootkatensis, Tsuga mertensiana and T. heterophylla), we used four stem-mapped, 50 m ×50 m plots. From measurements of annual rings, we obtained ages from basal discs of 1,336 live trees, developed master chronologies for each species, reconstructed early growth rates, and delineated periods of release. The stand was ancient; individuals of all four species exceeded 900 years in age, and the oldest tree exceeded 1,400 years. The four plots differed in the timing of events, and we found no evidence of major, stand-level disturbance. Instead the stand was structured by small-scale patch dynamics, resulting from events that affected one to several trees and initiated episodes of release and relatively rapid early growth. The species differed in age structure and dynamics. A. amabilis and T. heterophylla had a classical reverse-J age structure indicative of stable populations, whereas C. nootkatensis and T. mertensiana appeared to rely on local episodes of increased recruitment, which were often separated by centuries, and were probably related to multiple-tree gaps that occurred infrequently. However, such gaps could be considered normal in the long-term history of the stand, and thus these species with their long life spans can persist. Most individuals of all four species grew extremely slowly, with trees typically spending centuries in the understory before reaching the canopy, where they were able to persist for additional centuries. Thus, the key features of this forest are the very slow dynamics dominated by small-scale events, and the slow growth of stress-tolerant trees.     

Evidence for altitudinal migration of forest birds between montane Eastern Arc and lowland forests in East Africa

Burgess, N.D. & Mlingwa, C.O.F. 2000. Evidence for altitudinal migration of forest birds between montane Eastern Arc and lowland forests in East Africa. Ostrich 71 (1 & 2): 184–190.

In this paper we assess the evidence for altitudinal movements of forest birds from the montane forests of the Eastern Arc mountains of East Africa to nearby lowland forest patches. For 34 montane species, including all the Eastern Arc endemics except Banded Green Sunbird Anthreptes rubritorques there is no evidence that they undertake seasonal movements to lower altitudes. An additional 26 montane species, of somewhat wider distribution, have been recorded at low (<500 m) altitudes during the cold/dry season (June to September). Most records of these montane birds at lower altitudes are from sites adjoining montane forest areas, although a few records are from lowland coastal forests at 100–240 km distance from montane areas. Only five of the 26 species (White-chested Alethe Alethe fulleborni, White-starred Forest Robin Pogonocichla stellata, Orange Ground Thrush Zoothera gurneyi, Evergreen Forest Warbler Bradypterus mariae and Barred Long-tailed Cuckoo Cercococcyx montanus) are regularly and commonly reported in the lowlands. They are also found in the lowlands in small numbers during the warm/wet season (October to February), when they may breed. The abundance of at least four, and probably more, of the forest birds with a more widespread distribution in the lowland and montane forests of East Africa declines greatly at high altitudes from the onset of the cold/wet season (February) and only increases again at the start of the warm/wet season (September). It is not known how far these species move as they cannot be easily separated from resident populations in lowland forests, and there are no ringing recoveries in different forests. Altitudinal migration of a proportion of the Eastern Arc avifauna is the most likely explanation for available data, although source-sink metapopulation theories may be helpful to explain the distributions of some species. As the movement of forest birds from the Eastern Arc to the lowland forests does not involve the rare endemics, they are of lower conservation concern, but the presence of montane and lowland forest may be important for the long-term survival of some more widely distributed forest species.     

Determinants of woody species richness in Scot pine and beech forests: climate, forest patch size and forest structure

We analysed patterns of woody species richness in Pinus sylvestris and Fagus sylvatica forests in Catalonia (NE Spain) from forestry inventory databank in relation to climate and landscape structure. Both types of forests are found within the same climatic range, although they have been managed following somewhat different goals. Overall, woody species richness significantly increased when conditions get closer to the Mediterranean ones, with milder temperatures. Differences between the two types of forests arose when comparing the relationship between richness and forest patch size. Woody species richness increased in pine forests with patch size, while the opposite trend was observed in beech forests. This pattern is explained by the different behaviour of structural canopy properties, since leaf area index and canopy cover showed a steeper increase with increasing forest patch size in Fagus forests than in Pinus ones. Accordingly, richness decreased with canopy cover in Fagus plots, but not in Pinus ones. We suggest that these differences would be related to management history, which may have enhanced the preservation of beech stands in larger forest landscape units.     

Magellanic Woodpecker (Campephilus magellanicus) sap feeding and its role in the Tierra del Fuego forest bird assemblage

Several woodpecker species feed on phloem-sap flowing from pecked trees. We report sap consumption by the magellanic woodpecker (Campephilus magellanicus) inhabiting beech (Nothofagus) forests of Tierra del Fuego island (Chile). Magellanic woodpeckers drilled sap wells in N. betuloides trees close to their nests and also when they were moving in family groups. Three other bird species were observed foraging and competing for sap: the austral parakeet (Enicognathus ferrugineus) and two small passerines, the patagonian sierra-finch (Phrygilus patagonicus) and the white-crested elaenia (Elaenia albiceps). The abundance of these three bird species was greater in sites around sap wells than in other forest sites, suggesting that magellanic woodpecker is an important species in maintaining the Nothofagus forest bird assemblage.     

不同林龄麻栎林地下部分生物量与碳储量研究

探讨不同林龄麻栎林地下部分根系的生物量与碳储量,为麻栎林的经营管理及碳汇管理等提供科学依据。以江苏省句容市不同林龄(幼龄林、中龄林、近熟林、成熟林)的麻栎林为研究对象,采用全根挖掘法获取麻栎各级根系及灌草层根系,并测定其生物量、碳含量,构建麻栎根系生物量模型,估算麻栎林地下部分根系碳储量及麻栎林群落碳储量。通过11种数学回归模型的比较,构建麻栎各级根系生物量幂回归模型,计算得到幼龄林、中龄林、近熟林、成熟林麻栎根系生物量分别为14.81t/hm~2、41.15t/hm~2、50.36t/hm~2、53.75t/hm~2,各级根系生物量大小顺序是:根桩粗根大根细根;灌木与草本植物根系生物量分别为0.48—1.71t/hm~2、0.13—0.60t/hm~2;不同林龄麻栎林群落根系生物量为15.42—56.06t/hm~2,且随林龄的增大而增大。麻栎根系碳含量大小顺序为:根桩粗根大根细根,且碳含量差异显著;灌木与草本植物根系碳含量分别为41.84%—43.79%、34.03%—38.48%,随林龄变化均无明显变化规律。麻栎林乔木根系碳储量随林龄增大而增大,幼龄林、中龄林、近熟林、成熟林根系碳储量分别为6.01t/hm~2、17.41t/hm~2、21.79t/hm~2、21.99t/hm~2;灌木与草本植物根系碳储量均随林龄增大而增大;幼龄林、中龄林、近熟林、成熟林群落根系碳储量分别为6.26t/hm~2、17.74t/hm~2、22.37t/hm~2、22.94t/hm~2,且乔木层灌木层草本层。麻栎林地下部分根系生物量与碳储量随林龄的增大而增大,幼龄林到近熟林生长过程中生物量与碳储量增加快速,近熟林后生物量与碳素积累缓慢,且与成熟林接近。     

Habitat partitioning among neotropical pioneers: a consequence of differential susceptibility to browsing herbivores?

Four species of fast-growing pioneer tree species in the genus Cecropia exist in the forests in central Panama. Cecropia insignis is dominant in old-growth forests but absent from nearby secondary forests; C. obtusifolia, and C. peltata are abundant in secondary forests but rare in old-growth forest, and C. longipes is uncommon in both. To determine whether Cecropia habitat associations are a consequence of local dispersal or differences in recruitment success, we grew seedlings of these species in common gardens in large treefall gaps in secondary and old-growth forest. In contrast to the observed adult distribution, only C. insignis grew significantly over 16 months in secondary forests; remaining species were heavily browsed by herbivores. C. insignis also grew and survived best in old-growth forest. Differences in susceptibility to herbivory did not result from an ant defence mutualism; none of the plants were colonised by ants during the experiment. To test whether C. insignis, the species least susceptible to herbivory, trades off investment in growth in favour of defence, we also grew the four Cecropia species in a screened growing house under light conditions comparable to large forest gaps. Contrary to expectation, species growth rates were similar; only C. peltata grew significantly faster than C. insignis. These results suggest that (1) conditions in ~40-year-old secondary forests no longer support the recruitment of Cecropia species, which are canopy dominants there; and (2) among congeners, differences in plant traits with little apparent cost to growth can have large impacts on recruitment by affecting palatability to herbivores.     

Influence of Forest Types and Effects of Forestry Activities on Species Richness and Composition of Chrysomelidae in the Central Mountainous Region of Japan

Species richness and composition of the Chrysomelidae (Coleoptera) were studied in larch (Larix kaempheri [Lamb.] Carrière) plantations, secondary forests, and primary forests. In addition, the effects of forest management practices, such as thinning and long rotation, were examined in the larch plantation. The species richness of Chrysomelidae was higher in the larch plantation than in the secondary forest or in the primary forest. Among the larch plantations, the species richness in old-aged plantations was higher than that in middle-aged plantations. The composition of the beetle assemblages in the larch plantation differed from that in the secondary forest or in the primary forest. Exosoma akkoae (Chujo), Batophila acutangula Heikertinger, and Calomicrus nobyi Chujo were caught with a bias toward the larch plantation. Longitarsus succineus (Foudras) and Sphaeroderma tarsatum Baly were caught more in the secondary forest and the primary forest, respectively. More B. acutangula and S. tarsatum were caught in stands where their host plants occurred at higher rates. Species richness of understory plants was an important factor for chrysomlid species richness, and frequency of host occurrence affected the number of individuals of leaf beetles examined. It seems that forest types and forest management practices affect host plants as well as Chrysomelidae, and that these effects on the host plants also influence chrysomelid assemblages.