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1.
黄腹山雀属雀形目、山雀科鸟类,在吉林省一直没有记录。2010年5月20日,在吉林莫莫格保护区局址岛发现黄腹山雀,并拍到清晰的照片,填补了黄腹山雀在吉林省分布的空白。  相似文献   

2.
2008年6月,在甘肃尕海—则岔自然保护区野外调查期间发现一北红尾鸲巢址。巢址位于峭石石缝中,大小7 cm×6 cm、巢深5 cm。巢材由羊毛、体羽、草茎、须根等组成。北红尾鸲育雏频率为1次/6.4 min,亲鸟育雏时间间隔为9.9 s(3~20 s),食物包括蛾类、小蝗虫和昆虫幼虫等。  相似文献   

3.
邹异 《广西林业》2009,(5):29-31
2006年9月15日,联合考察队证实靖西县壬庄乡邦亮林区有黑冠长臂猿分布,因发现黑冠长臂猿是重要事情,自治区林业局领导经慎重考虑,要求派专家再次前往实地考察核实,确保黑冠长臂猿存在我区的真实性。为此,我和自治区保护站韦振逸副站长、林业设计院的小冯、弄岗保护区的小陈组成考察队前往核实。  相似文献   

4.
陕西秦岭地区黑喉歌鸲繁殖行为监测简报   总被引:1,自引:0,他引:1  
2012年4—7月,采用固定样线法,初步监测和研究了在陕西长青国家级自然保护区最近发现的黑喉歌鸲育雏习性和巢穴特征。  相似文献   

5.
森林道路对山雀类利用人工鸟巢的影响   总被引:1,自引:0,他引:1  
于2002 年11月至2003年6 月间, 在韩国安养首尔大学冠岳植物园(37°25'05"N,126°56' 85"E)阔叶林、针叶林和针阔混交林内研究了森林道路对山雀类利用人工鸟巢的影响。对在人工巢箱中繁殖的山雀类,杂色山雀(Parus varius)、沼泽山雀( P. palustris)和大山雀(P. major)的繁殖对的数量、巢位、窝大小、卵重及卵大小进行了调查。调查结果显示,在 3 个研究区,杂色山雀在森林内部(距离道路 75–150m)的繁殖对数量,比森林边缘(距离道路 0–75 m)多,其窝大小、卵重等尺寸也明显比森林边缘高,但沼泽山雀基本不受森林道路的影响。在人类活动频繁的地区人工巢箱为洞穴鸟类提供良好的繁殖条件。人工鸟巢的设置将有利于这些鸟类的保护和管理。表 3 参 16。  相似文献   

6.
几年来,笔者在野外工作和群众救护过程中记录到白水江自然保护区各类鸟类实体124种,通过对比发现其中有鹰雕、白腰文鸟为甘肃省新纪录,灰斑鸠、蓝鵐、大鵟、游隼、黑鹳、黄颈拟蜡嘴雀、秃鹫、白骨顶鸡、红嘴鸥、褐冠山雀等10种为保护区新纪录,并见到兀鹫实体,为保护区文献记载物种。  相似文献   

7.
《广西林业》2009,(3):7-7
4月30日,在东部黑冠长臂猿保护阶段性总结研讨会上记者了解到,这一2002年才在地球上被重新发现的新物种目前数量已达18群110只,其中在我国境内从2006年初发现时的17只增加到了23只。这是东部黑冠长臂猿跨边界保护项目的有效成果。  相似文献   

8.
简要介绍了山西黑茶山省级自然保护区的概况,通过访问和野外实地调查发现,保护区内褐马鸡分布较广,以油松林为主的针阔混交林、乔灌混交林是其最适宜的栖息地,同时还介绍了褐马鸡求偶、配对、产卵、育雏、越冬等生态习性。  相似文献   

9.
云南省景东县境内的无量山国家级自然保护区是地球上黑冠长臂猿分布的重要栖息地,号称"中国黑冠长臂猿之乡"。目前景东自然保护区管理局已在保护区内建立了野外黑冠长臂猿观测站,长期实现对黑冠长臂猿的监测研究。  相似文献   

10.
姚家坪     
<正>姚家坪观鸟点地处高黎贡山国家级自然保护区泸水片区,海拔跨度2020-3700米。生态保护完好,有最完整的中山常绿阔叶林、针阔混交林及高山箭竹林、高山灌丛等植被类型,其间分布着红豆杉、红花木莲、水青树、十齿花、长蕊木兰等珍稀植物。鸟类资源丰富,常见的有丽色奇鹛、白眉雀鹛、印缅褐头雀鹛、灰眶雀鹛、灰喉柳莺、冠纹柳莺、红头长尾山雀、黑眉长尾山雀、黑脸鹟莺、栗头鹟莺、黑顶噪鹛、纯色噪鹛、绿喉太阳鸟、蓝喉太阳鸟、  相似文献   

11.

In Scandinavia, moose (Alces alces L.) sometimes cause severe browsing damage to economically-important pine. Moose-vehicle accidents have spurred construction of fences along roads, and these may interfere with moose migration between summer and winter ranges, or the road alone may be a barrier. If this happens and moose build up along roads, landowners may suffer economically. Therefore, this study investigated whether roads, fences or other factors influence the use of young pine stands by moose. Eighty stands along roads in northern Sweden were evaluated in which individually-browsed branches were counted on 9972 pines. Moose browsing was not significantly related to birch (Betula pendula Roth, B. pubescens Ehrh.) density, nor did it differ between pines (Pinus contorta Douglas or P. sylvestris L.). However, increased pine density, site productivity and proximity to a highway were associated with increased browsing. Further large-scale studies are needed to understand moose habitat selection and the effects of roads.  相似文献   

12.

The root systems of 2-yr-old Picea glauca, Picea mariana and Pinus banksiana seedlings were submitted to various frost temperatures during an artificial frost to induce different levels of root damage. Frost-damaged and control seedlings were placed in a greenhouse under high and low soil moisture regimes. Seedling growth and physiology were evaluated periodically. Seedling survival was reduced when root damage reached levels of 60-80%. Root systems of all three species showed partial to total recovery by the end of the experiment. In general, root freezing damage caused reductions in seedling growth, with these reductions becoming less significant over time. Root damage had little to no effect on black spruce and jack pine seedling physiology, while white spruce CO 2 uptake decreased with increasing root damage. Shoot nitrogen content of all three species decreased slightly with increasing root damage.  相似文献   

13.

This study investigated the stand structure in pine, spruce and deciduous forests in the border district of Finland and Russia. A total of 46 mature forest stands was selected as pairs, the members of each pair being as similar as possible with respect to their forest site type, age, moisture and topography. The stands were then compared between the two countries by means of basal areas and number of stems. The proportions of dominating tree species were 2-12% lower, and correspondingly the proportions of secondary tree species higher, in Russian forests. The density of the forest stock was also higher in each forest type in Russia. The forests in the two countries differed most radically in terms of the abundance of dead trees. The amount was two to four times higher in Russian deciduous and spruce forests, and in pine forests the difference was 10-fold. The stand structures indicated that Russian coniferous stands, in particular, were more heterogeneous than intensively managed pine and spruce stands in Finland.  相似文献   

14.

The root collar diameter and the height:diameter ratio are of particular importance in container-grown seedlings where a high density in the containers may produce spindly seedlings. Temperature regimes and light quality are known to affect plant growth. The aim of this study was to identify responses in Picea abies (L.) Karst. seedlings grown with light providing different red:far-red ratios and under temperature regimes with alternating day (DT) and night temperature (NT) from negative (DT < NT) to positive (DT > NT) difference (DIF) between DT and NT. Experiments were conducted in controlled environment chambers and in a daylight phytotron. Only limited thermoperiodic responses appeared in P . abies seedlings with respect to seedling height and dry weight accumulation. The formation of terminal buds, however, was clearly delayed in seedlings grown at negative DIF. The results indicate a requirement for day extension light that is high in far-red, to prevent terminal bud formation under natural short-day conditions. An extended study should be conducted to clarify the minimum level of light intensity and the optimal light quality needed to prevent terminal bud formation under natural short-day conditions.  相似文献   

15.
本文分析了CAD在设计中引起的正面和负面影响,并进行了系统的阐述,从而使设计者在应用中能够保持客观的态度。  相似文献   

16.
17.

Based on an enquiry, risk perception among non-industrial private forest owners is described in relation to climate change and forestry hazards. Of the respondents, 11% took action to remedy the effects of climate change. Out of a given set, hazards were ranked according to each respondent's experience of recent substantial financial loss to the estate and in relation to his or her willingness to make investments aimed at risk reduction. For each hazard, the respondent assessed the risk in four classes ranging from very high to negligible risk. Six hazards were considered most problematic in all three aspects: browsing damage, falling timber prices, damage by wind, spruce bark beetle, root rot and pine weevil. A majority of the respondents claimed to take action to reduce the risk associated with at least one hazard, while 35% did not know whether they did. Excluding climate change, the need for decision support was the largest in relation to damage by wind owing to a combination of perceived high risk and a high level of ignorance in relation to whether risk-reducing measures were taken.  相似文献   

18.

The effects of soil scarification (mounding), slash removal and clear-cut age on the natural regeneration in clear-cuts was evaluated using data from four sites in southern Sweden. The treatments were carried out during a good seed and establishment year for birch ( Betula pubescens Ehrh. and B. pendula Roth). Scarification had the strongest positive effect on the density of naturally regenerated seedlings, especially in birch, but also in pine ( Pinus sylvestris L.) and spruce [ Picea abies (L.) Karst]. Slash removal had a positive effect on birch density. No statistically significant effect of clear-cut age was found. In addition, no statistically significant interactions between clear-cut age and scarification or slash removal were found. The ingrowth of field vegetation was the fastest in areas that were not scarified, less rapid in areas scarified on old clear-cuts, and the slowest after scarification in fresh clear-cuts. In conclusion, it may be possible to control the density of birch during a good establishment year for birch. If birch is desired, the best combination of treatments is to remove the slash and scarify; otherwise, these treatments should be avoided.  相似文献   

19.
In situ produced plant residues contain a mixture of different plant components of varying quality. To assess synergistic or antagonistic interactions occurring during the decomposition and mineralization of such mixtures, individual plant parts (stems, leaves, leaf litter and roots) or the mixture of stems, leaves and leaf litter of the agroforestry species pigeonpea (Cajanus cajan) or of crop residues of peanut (Arachis hypogaea) or of the weed hairy indigo (Indigofera hirsuta) were incubated in pots for 19 weeks. Periodically, remaining plant residues were sieved out (>2 mm), weighed and N content as well as soil mineral N determined. Above- and below-ground residues of peanut decomposed fastest and showed the largest N release in agreement with their high N concentration and low-acid detergent fibre (ADF) : N ratio. Hairy indigo was hypothesized to be of lower quality than pigeonpea because of its high-polyphenol content. However, it decomposed faster than pigeonpea, largely because of the higher N and lower lignin concentration of its components. Ranking of individual plant components for N mineralization resulted in the following pattern, leaves > leaf litter > roots > stems. In mixtures of the different plant components a similar species order in decomposition was obtained, e.g. peanut > hairy indigo > pigeonpea. The amount of N released from the mixture was dominated by stem material that comprised 46–61% of the mixture. The interactions in mixtures were relatively small for peanut (generally high-quality components) as well as for pigeonpea (low proportion of high-quality components, i.e. N rich leaf material). However, a positive interaction occurred during later stages of N mineralization in the mixture of hairy indigo as it had a significant proportion of N rich components and absence of highly reactive polyphenols. Thus, for plants with low to intermediate chemical quality attributes, manipulating plant composition (e.g. by varying harvest age, affecting stem and leaf proportions) will be important to obtain significant interactions during decomposition when its components are mixed.  相似文献   

20.
The use of organic waste materials such as milk sewage as an organic fertilizer could have the dual advantages of organic-waste disposal and reduced dependence on inorganic fertilizers. The effects of fertilization with (1) conventional mineral fertilization, (2) milk sewage sludge at 40 kg N ha−1 target rate and (3) no fertilization on pasture production and tree growth were examined in an experiment consisting of two pasture mixtures under a one-year-old Pinus radiata plantation with a density of 2500 trees ha−1. The two pasture mixtures were: (1) Dactylis glomerata L. var. saborto (25 kg ha−1) + Trifolium repens L. group Ladino (4 kg ha−1) + Trifolium pratense L. var. Marino (1 kg ha−1); (2) Lolium perenne L. var. Tove (25 kg ha−1) + Trifolium repens L. group Ladino (4 kg ha−1) + Trifolium pratense L. var. Marino (1 kg ha−1). The experiment began in the spring of 1995 using a randomized block design with three replicates in Castro Riberas de Lea (Lugo, Galicia, north-western Spain). Plot size was 12 × 8 m2, with a 1 m buffer strip between plots. Two-year data showed that fertilization with either material had a positive effect on pasture production, with no significant difference between the two fertilization treatments. Tree growth in the milk sewage sludge plot was significantly higher than in the control plots. Inorganic fertilization increased pasture production, but affected tree growth negatively. The results show that milk sewage sludge could be used as a fertilizer in silvo-pastoral systems. This revised version was published online in June 2006 with corrections to the Cover Date.  相似文献   

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