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Assessing forest fragmentation in north-western Himalaya:a case study from Ranikhet forest range,Uttarakhand,India

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Journal of Forestry Research 2017年第2期28卷 319-327页

作者： Mohit Sharma Anusheema Chakraborty J.k.Garg p.k.joshi University School of Environment Management Guru Gobind Singh Indraprastha University Department of Natural Resources TERI University School of Environmental Sciences Jawaharlal Nehru University

The northwestern Himalaya harbors high levels of biodiversity due to its unique topography, climatic conditions and heterogeneity. Forest fragmentation is one of the major threats causing a decline in biodiversity in the Himalayan region. We assesses forest fragmentation and changes in land use land cover（LULC） patterns using multi-temporal satellite data over a time span of four decades（1976–2013）. Fragmentation analysis using the Landscape Fragmentation Tool（LFT） reveals a decrease in core and edge areas by 14 and 2.3 %, respectively; while an increase in non-forest, patch area and perforation area by 2.1, 0.4, and 14 %, respectively. The LULC dynamics show that the areas under dense forest and scrub forest have decreased by 2.8 % and 1.9 %, respectively; and there is an increase in open forest, crop land and fallow land area by 2.6, 1.7 and 2.1 %, respectively. The quantification of landscape heterogeneity is undertaken with the help of landscape metrics computed using FRAGSTATS at class and landscape level, showing signs of increased fragmentation. Our study provides baseline database that can support the future biodiversity conservation and sustainable forest management initiatives.

关键词： fragmentation landscape patch biodiversity heterogeneity Himalayan climatic FRAGSTATS showing northwestern

Assessing impact of climate change on forest cover type shifts in Western Himalayan Eco-region

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Journal of Forestry Research 2012年第1期23卷 75-80页

作者： p.k.joshi Asha Rawat Sheena Narula Vinay Sinha Department of Natural Resources TERI UniversityNew Delhi 110070India

Climate is a critical factor affecting forest ecosystems and their capacity to produce goods and services. Effects of climate change on forests depend on ecosystem-specific factors including dimensions of climate （temperature, precipitation, drought, wind etc.）. Available infor- mation is not sufficient to support a quantitative assessment of the eco- logical, social and economic consequences. The present study assessed shifts in forest cover types of Western Himalayan Eco-region （700-4 500 m）. 100 randomly selected samples （75 for training and 25 for testing the model）, genetic algorithm of rule set parameters and climatic envelopes were used to assess the distribution of five prominent forest cover types （Temperate evergreen, Tropical semi-evergreen, Temperate conifer, Sub- tropical conifer, and Tropical moist deciduous forests）. Modelling was conducted for four different scenarios, current scenario, changed precipi- tation （8% increase）, changed temperature （1.07℃ increase）, and both changed temperature and precipitation. On increasing precipitation a downward shift in the temperate evergreen and tropical semi-evergreen was observed, while sub-tropical conifer and tropical moist-deciduous forests showed a slight upward shift and temperate conifer showed ＇no shift. On increasing temperatm＇e, an upward shift in all forest types was observed except sub-tropical conifer forests without significant changes. When both temperature and precipitation were changed, the actual dis- tribution was maintained and slight upward shift was observed in all the forest types except sub-tropical conifer. It is important to understand the likely impacts of the projected climate change on the forest ecosystems, so that better management and conservation strategies can be adopted for the biodiversity and forest dependent community. knowledge of impact mechanisms also enables identification and mitigation of some of the conditions that increase vulnerability to climate change in the fore

关键词： Climate change forest cover types shift western Himalaya genetic algorithm

应用遥感技术研究土地利用土地覆盖变化及其对土壤侵蚀过程的影响——以印度北部paliGad山地流域为例

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云南植物研究 2006年第2期28卷 175-182页

作者：李巧宏许建初 p.k.joshi Nikhil LELE 中国科学院昆明植物研究所云南昆明650204 印度遥感研究所台拉登印度248001

应用遥感技术评估了印度北部paliGad山地流域过去几十年里土地利用土地覆盖变化及其造成的土壤侵蚀程度,并基于摩根参数模型(Morgan parametric Model)的方法来测定土壤的侵蚀程度;结果表明,由于不同的坡向受到太阳光照的不同可以引起... 详细信息

应用遥感技术评估了印度北部paliGad山地流域过去几十年里土地利用土地覆盖变化及其造成的土壤侵蚀程度,并基于摩根参数模型(Morgan parametric Model)的方法来测定土壤的侵蚀程度;结果表明,由于不同的坡向受到太阳光照的不同可以引起土地覆盖的变迁;海拔和坡度已不再是阻碍人们获取自然资源的因素,人们的活动范围正转移到更高的海拔和更陡峭的坡度;揭示了土地利用土地覆盖变化对土壤侵蚀进程有着直接的影响。

关键词：遥感地理信息系统喜马拉雅西部土地利用/土地覆盖变化土壤侵蚀

遥感与地理信息系统对资源利用热点地区的初步应用———以印度北部山地小流域为例

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自然资源学报 2003年第3期18卷 368-374页

作者：杨雪飞许建初 p.k.joshi p.S.Roy k.k.Das 中国科学院昆明植物研究所云南昆明650204 印度遥感研究所

资源利用与资源退化在时间及空间领域上的表现有所分异。识别出那些受人为干扰严重且易于发生资源退化的区域(资源利用的热点地区),对这些区域给予重视并采取特殊的管理机制以避免资源的进一步退化和环境的恶化,对资源的可持续利用具有... 详细信息

资源利用与资源退化在时间及空间领域上的表现有所分异。识别出那些受人为干扰严重且易于发生资源退化的区域(资源利用的热点地区),对这些区域给予重视并采取特殊的管理机制以避免资源的进一步退化和环境的恶化,对资源的可持续利用具有重要的现实意义。论文以印度北部山地小流域的研究为例,根据当地实际情况,选取4个参数作为评价指标,即资源利用的重要性、资源的需求程度、资源利用的可获取性以及人类活动造成的景观生态学的干扰指数,利用遥感技术和地理信息系统对资源利用热点地区的识别进行了初步探讨。通过研究,将该流域划分为3种区域,即高度敏感区、中度敏感区和低敏感区,分别体现了不同的资源退化在空间上的分布。

关键词：遥感与地理信息系统资源利用资源退化流域划分山地小流域评价指标

印度北部pali Gad流域资源利用模式研究(英文)

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云南植物研究 2009年第6期31卷 551-558页

作者：李巧宏 p.k.joshi 杨雪飞 N.Lele 许建初中国科学院昆明植物研究所山地生态系统研究中心云南昆明650204 联合国空间科学与技术教育中心印度台拉登248001 印度Teri大学印度新德里110070 印度国家遥感研究所印度台拉登248001 世界混农林中心

喜马拉雅西部独特、丰富的自然资源对当地居民生计及生态服务等方面起着重要的作用。由于长期以来当地居民与山地生态系统的相互作用,特别是农业生产、畜牧业放牧、薪柴采集以及其他多种多样的资源利用方式,形成了一种特殊的山区文化景... 详细信息

喜马拉雅西部独特、丰富的自然资源对当地居民生计及生态服务等方面起着重要的作用。由于长期以来当地居民与山地生态系统的相互作用,特别是农业生产、畜牧业放牧、薪柴采集以及其他多种多样的资源利用方式,形成了一种特殊的山区文化景观。本文以印度北部的山地小流域pali Gad(共有25个村子)为例,主要研究当地的资源利用状况,利用卫星遥感数据对该地区可利用自然资源进行评估分析,通过从户到户的社会经济调查,对其提供的生态服务功能以及受威胁的程度进行估计,研究分析了村民对资源需求及获取的时空变化情况。结果显示,平均每人每天的薪柴采集量为1.12kg,平均每人每天通过修剪枝叶获得饲料采集量为3.69kg,平均每人每天从森林中采集草料的量为3.25kg。对生态系统服务功能进行估测的结果显示,森林可提供更多的临时调节功能,而农业更多的是支撑服务功能,河流/水体给当地人提供了文化服务功能。以山区典型的人-地生态系统为例,这类生态系统中的自然资源破碎化程度很高。研究发现,该区域贫瘠土地上的自然资源需求还在不断增加。因此,从长远来看,人对资源的无止境获取将不利于整个流域的可持续发展。

关键词：生态系统服务喜马拉雅西部 pali Gad流域资源利用和需求

Erratum to:Snow Cover Variation and Streamflow Simulation in a Snow-fed River Basin of the Northwest Himalaya

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Journal of Mountain Science 2013年第3期 494-494页

作者： Vaibhav SHARMA V.D.MISHRA p.k.joshi Snow and Avalanche Study Establishment TERI University

Technological advancements in millet dehulling and polishing process: An insight into pretreatment methods, machineries and impact on nutritional quality

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Grain & Oil Science and Technology 2024年第3期7卷 186-195页

作者： Shagolshem Mukta Singh Jayasree joshi T p.Srinivasa Rao Agricultural and Food Engineering Department Indian Institute of Technology KharagpurKharagpurWest Bengal 721302India

Millets are widely recognized for their nutritional significance;however, the methods employed for their processing are currently lacking. This article primarily focuses on the advanced technologies and progressions in millet dehulling and polishing. These technologies operate based on the fundamental principles of compression-shearing, abrasion-friction, and centrifugal-impact forces. processing of millets can be challenging because of the physical characteristics and tight attachment of hull and bran to the endosperm. However, several dehullers have been designed to solve this problem for different kinds of millets. In addition, the nutritional and anti-nutritional characteristics undergo alterations due to both dehulling and polishing processes. These alterations are thoroughly examined and discussed in this article. Specifically, anti-nutrients such as tannins and phytate are predominantly found in the outer pericarp of the grain and experience a reduction after undergoing dehulling and polishing. The nutritional properties are also subjected to a reduction;however, this reduction can be mitigated by subjecting the grains to certain pretreatments before dehulling and polishing. These treatments serve to enhance dehulling efficiency and nutrient digestibility while simultaneously reducing the presence of anti-nutrients. Novel thermal and non-thermal methodologies such as microwave, hydrothermal, high-pressure processing, and ohmic heating can be employed for processing millets, thereby diminishing the loss of nutrients. Additional research can be carried out to investigate their impact on the dehulling and polishing of millets.

关键词： Millets Dehulling polishing pretreatment Novel thermal and non-thermal techniques

Sedimentological evidence of climate-tectonic interaction in the upper Satluj catchment of NW Himalaya

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Journal of Mountain Science 2024年第6期21卷 1978-1991页

作者： joshi Moulishree JALAL poonam Department of Geology Kumaun UniversityNainitalUttarakhand 263001India

Quaternary valley fill deposits in the Upper Satluj Valley of NW Himalaya act as archives of changing climate-tectonic dynamics in a *** landforms help in decoding the relationship between climate and *** region is traversed by several active faults and thrusts such as the kaurik-Chango Fault(kCF)and Sangla Detachment(SD),thereby making upper Satluj Valley tectonically *** parameters such as width of valley floor(Vfw),Normalized Steepness Index(kSn)and geomorphological evidences such as the presence of huge strath terraces,narrowing of the river valley and palaeolake deposits point towards the tectonically active nature of the *** arid,high elevation region is also climatically sensitive as it falls in a transient climatic zone which receives rainfall only during abnormal monsoon *** rainfall causes outburst floods,a common phenomenon in the area due to the blocking of headwater in the upper reaches of the Satluj *** a result,the Quaternary sequence is modified from time to *** transition from hypo concentrated deposits to channel deposits and ponding events are prominent in the depositional sequence,resulting from a response to *** studied Quaternary sediments reveal that the Trans-Himalayan region of the upper Satluj valley is affected by tectonic-climate variability,making it vulnerable to geohazards.

关键词： Himachal pradesh Quaternary Lithofacies association Tectonics Climate

Hydrothermal treatment of pearl millet grains:Effects on nutritional composition,antinutrients and flour properties

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Grain & Oil Science and Technology 2024年第2期7卷 87-95页

作者： p.prashanth T.Jayasree joshi Shagolshem Mukta Singh p.Srinivasa Rao Agricultural and Food Engineering Department Indian Institute of Technology KharagpurKharagpurWest Bengal 721302India

pearl millet(pennisetum glaucum)is one of the major millets with high nutritional *** crop exhibits exceptional resilience to drought and high ***,the processing of pearl millet poses a significant challenge due to its high lipid content,enzyme activity,and presence of ***,it becomes imperative to enhance the quality and prolong the shelf life of pearl millet flour by employing suitable *** treatment in the food industry has long been seen as promising due to its potential to reduce microbial load,inactivate enzymes,and improve nutrient *** study aims to investigate the effects of hydrothermal treatment on the quality characteristics of pearl *** independent variables of the study were soaking temperature(35,45,55℃),soaking time(2,3,4 h),and steaming time(5,10,15 min).Treatment conditions had a statistically significant effect on nutrient *** antinutrients like tannins and phytates were reduced by 0.99% to 5.94% and 0.36% to 6.00%,respectively,after the *** activity decreased significantly up to 10% with the treatment *** findings of this study could potentially encourage the use of pearl millet flour in the production of various food items and promote the application of hydrothermal treatment in the field of food processing.

关键词： pearl millet Hydrothermal treatment Nutritional properties Antinutrients