长白山苔原带土壤动物群落结构及多样性

长白山苔原生态系统对环境变化非常敏感,一旦破坏很难恢复。土壤动物是陆地生态系统的重要组成部分,联系着地上和地下生态系统。为探讨长白山苔原带土壤动物群落的组成、结构和多样性特征,于2009年5月、7月和9月对上部和下部苔原带土壤动物进行了研究。研究表明:长白山整个苔原带土壤动物优势类群为甲螨亚目、节跳虫科和球角跳虫科。下部苔原亚带土壤动物个体数和类群数多,群落结构较为复杂。土壤动物的个体数随生境和时间变化有很大波动,类群数变化则较小。在7月份个体数最少,而类群数随着时间的变化有减少的趋势。土壤动物的垂直分布随时间和生境的不同而异。上部苔原亚带9月的甲螨亚目(P﹤0.01)、革螨亚目(P﹤0.05)及下部苔原亚带5月的甲螨亚目、革螨亚目、辐螨亚目(P=0.03,P=0.011,P=0.027)0—5 cm土层显著高于凋落物层;下部苔原亚带5月的球角跳虫科(P=0.001)及各月的节跳虫科和山跳虫科在各层之间存在显著差异(P=0.001,P=0.036,P=0.005,P=0.001,P=0.04,P=0.009)。两个亚带土壤动物多样性随时间的变化都有递减的趋势。土壤动物的多样性指数、丰富度指数和均匀度指数均是下部苔原亚带高于上部苔原亚带,而优势度指数则相反。相似性指数表明两个亚带土壤动物群落组成上存在一定的差异,各类群的相对数量差异在9月最大。下部苔原亚带的生境条件较适宜土壤动物生存,生物多样性较高。     

广州市昆虫群落结构及动态

2005-2006年对广州市全区域的昆虫群落进行6次调查,对该区域昆虫群落结构、多样性及时间动态进行了分析.共记述22个目、216个科.鞘翅目的类群最丰富,双翅目、鳞翅目、膜翅目和半翅目次之;鞘翅目昆虫的个体数量最多(30.45),其次为鳞翅目(18.89)和膜翅目(14.78).6～7月昆虫类群数和个体数量最多,12月最少;6～7月的种类丰度最高,其次为3～4月、9～10月,12月最低;Shannon-Wiener指数从高到低依次为6～7月、9～10月、3～4月、12月;Pielou均匀度指数从高到低依次为6～7月、9～10月、12月、3～4月;12月的种类优势度最高,其次为3～4月、9～10月,最低为6～7月.     

山东莱西花生产区昆虫群落基本结构及多样性研究

【目的】花生是山东省主要油料作物,为阐明山东莱西花生田昆虫群落结构及多样性。【方法】2014年6月到2015年6月采用马来氏网法对该地区花生田昆虫群落结构进行了调查研究。【结果】全年共获得各类昆虫标本89 967头,分属于13目、117科;主要以膜翅目、鞘翅目、双翅目、鳞翅目和半翅目为主,其中茧蜂科(膜翅目)、露尾甲科(鞘翅目)、缟蝇科(双翅目)、夜蛾科(鳞翅目)、蚜科(半翅目)为科级优势类群;花生蚜Aphis craccivora Koch、小绿叶蝉Jacobiasca formosana、小地老虎Agrotis ypsilon、棉铃虫Heliothis armigera、斜纹夜蛾Spodoptera litura、异色瓢虫Leis axyrids、蚜茧蜂(Aphidiidae)、啮小蜂(Tetrastichidae)、黑带食蚜蝇Epistrophe balteata De Geer等为优势种。【结论】多样性分析结果表明,该地区花生田昆虫群落结构的多样性指数、均匀度指数和丰富度指数较高,三者呈一致趋势,说明莱西花生田昆虫群落具有较高稳定性。     

转双抗虫基因107杨节肢动物群落特征及相对稳定性

于2015年5—9月对唐山市滦南县苗圃场内的转双抗虫基因(Bt Cry1Ac和API基因)107杨(简称:转抗虫基因107杨)及未转基因107杨(简称:对照杨)进行了节肢动物群落调查,利用群落特征指数、群落相似性系数、群落相对稳定性和主成分分析法对转抗虫基因107杨节肢动物群落特征、相似性、相对稳定性及主成分进行对比分析。调查共获得节肢动物6818头,隶属于2纲,8目,43科,58种。研究结果表明:转抗虫基因107杨和对照杨节肢动物群落中以鳞翅目、鞘翅目、膜翅目、双翅目昆虫为主要类群,其中鳞翅目昆虫个体数量最多;鳞翅目和半翅目昆虫个体数量与对照杨差异显著;在功能类群上,转抗虫基因107杨食叶昆虫个体数量较对照杨显著减少,刺吸昆虫个体数量显著增加;转抗虫基因107杨节肢动物群落多样性指数、均匀度指数较高,优势度指数较低,节肢动物群落物种分布较均匀;相似性结果显示,物种组成与对照杨相似度较高;转抗虫基因107杨节肢动物群落物种间在数量上的制约作用较强;主成分分析表明食叶昆虫物种数量与个体数量、刺吸昆虫物种数量和其他植食性昆虫个体数量是影响转抗虫基因107杨与对照杨节肢动物群落变化的共同主导因子。     

长白山高山苔原带蛾类物种组成及其时间动态

长白山高山苔原带环境条件恶劣，通过对高山苔原带蛾类研究，揭示蛾类物种组成以及时间变化，可为研究蛾类对苔原极端生境的适应能力，以及蛾类在维持苔原带生态平衡中的作用提供依据。2005-2007年和2019年，每年的6、7、8月，在长白山高山苔原带利用灯诱采集蛾类标本，分析蛾类的物种组成以及时间动态。共采集蛾类1585头，隶属于13科126种，夜蛾科（Noctuidae）为优势类群，绿组夜蛾（Anaplectoides prasina）和一色兜夜蛾（Cosmia unicolor）为优势种，稀有种较多。蛾类的种-多度分布接近生态位优先假说。7月份蛾类的物种数、个体数最多，丰富度指数、多样性指数都最高，但均匀度指数却最低。不同种类对时间的反应表现出一定的差异，黄绿组夜蛾（Anaplectoides virens）对8月，厉切夜蛾（Euxoa lidia）对6月的适应力相对较强。各物种的顺序日期存在一定的差异性，只有10种蛾类在3个月份都被采集到。研究表明，长白山高山苔原带蛾类的多样性较低，成虫活跃期较短；不同类群的蛾类在苔原环境中显示出差异化的适应性，夜蛾科的适应能力超过其它类群，尺蛾科（Geometridae）的适应性相对较低，蛾类对时间的变化反应比较敏感。     

菜区趋光性昆虫物种多样性与季节动态分析

菜区趋光性昆虫包含10目47科173种,以鳞翅目和鞘翅目的数量最大,分别占总类数的54.33%和20.81%.3月中旬～5月上旬、10月上旬～12月中旬间物种数出现两个高峰,且后者明显高于前者.物种多样性在4月上旬～5月上旬、9月份、11月下旬～翌年1月份较高,其变化同物种数和个体数量有关.不同季节均以鞘翅目、同翅目和鳞翅目的优势集中性较高.     

东营盐生植物园土壤动物群落多样性研究

【背景】生物多样性是生物安全的重要内容之一,其包括基因多样性、物种多样性和生态系统多样性3个方面。环境污染、农药污染、重金属污染、海水倒灌、人类活动等诸多因素导致了物种多样性的降低。保护生物多样性是黄河三角洲大规模开发建设必须考虑的关键问题之一。【方法】用Tullgren干漏法分离、采集山东省黄河三角洲地区东营盐生植物园的土壤动物标本,对其多样性进行研究。【结果】蜱螨目是该地区的主要优势类群,占捕获土壤动物总数量的78．95％;另一优势类群为弹尾目,占捕获土壤动物总数量的14．03％;膜翅目和鞘翅目是常见类群,分别占捕获土壤动物总数量的3．57％和1．43％;其他均为稀有类群。在调查的10块样地中,优势类群弹尾目个体数量变化明显,在不同样地问的分布数量存在明显差异。东营盐生植物园土壤动物多样性与均匀度变化规律一致。【结论与意义】蜱螨目、弹尾目、膜翅目和鞘翅目构成了东营盐生植物园土壤动物的主体,对该区土壤动物群落多样性特征起着决定性作用。该区稀有类群多,但稀有物种数量较少,如不采取有效措施,该区的稀有物种随时有灭绝的危险。同时,盐胁迫作用的增强,能够影响土壤动物的数量与分布。因此,我们应在关注盐碱地改造进程的同时,更加关注该区土壤动物多样性的变化。     

豫西山地传粉昆虫物种多样性对地貌和季节的响应

通过野外试验布设陷阱捕捉传粉昆虫,调查豫西山地春秋两季不同人为强度土地利用下的传粉昆虫多度、丰富度等,并结合实地的植被群落特征,研究传粉昆虫的多样性、群落相似性及物种重要度(重要值).结果表明: 春秋两季累计捕获传粉昆虫23275头,优势类群多为膜翅目、双翅目等.春季捕获传粉昆虫的数量约是秋季数量的1.8倍,且两个季节传粉昆虫的个体多度差异达到极显著水平.春秋季捕获的双翅目、膜翅目相对多度较高,且季节之间变化不大.鳞翅目、鞘翅目个体数量较少,其中春季捕获的鳞翅目数量极少,秋季的鞘翅目数量也偏低.丘陵的Shannon多样性指数、Pielou均匀度指数和Margalef丰富度指数要明显高于其他两种地貌类型;山地的优势度指数和物种的个体数均高于其他两种地貌类型.不同地貌传粉昆虫的多样性和优势度差异达到显著水平,丘陵传粉昆虫多样性与山地和平原均有显著差异,山地的优势度与丘陵有显著差异.季节变化对传粉昆虫群落影响较小,但群落内各物种组成之间存在一定差异.从Morisita-Horn和Sørensen相似系数来看,仅有膜翅目群落在山地和丘陵间有显著差异.春秋季的物种重要值也存在差异,春季中胡蜂科的重要值最高,寄蝇科、果蝇科次之;秋季中花蝇科重要值最高,胡蜂科次之.传粉昆虫与农作物密切相关,影响着作物生长和粮食产量.在种植作物过程中因地制宜,合理规划土地利用方式,根据不同地貌内的植被类型适当调整物种组成,保护其多样性,对维持农业可持续发展和提高生态系统服务意义重大.     

长白山针阔混交林不同演替阶段的昆虫多样性

昆虫多样性变化对生态系统健康有重要的指示作用, 为研究昆虫群落变化与生境演替之间的关系, 本研究采用网捕、灯诱和诱捕法系统调查了长白山针阔混交林不同演替阶段（次生白桦林、次生针阔混交林、原始阔叶红松林）昆虫群落的组成和多样性, 分析了昆虫在森林演替过程中的规律及与植被群落之间的关系。系统调查共采集昆虫标本8 183头, 隶属于14个目699种, 其中鳞翅目和鞘翅目是主要优势类群。次生针阔混交林昆虫的个体数量最多, 原始阔叶红松林中物种数最多。不同演替阶段昆虫群落的物种数和个体数差异不显著, 但次生针阔混交林、原始阔叶红松林的Fisher’s α指数显著高于次生白桦林。目水平上的昆虫多样性未表现出显著性差异. 昆虫多样性在森林演替过程中和草本植物多样性的变化趋势相同;由于食性和生境选择的不同, 森林演替过程中鳞翅目昆虫多样性逐渐升高, 而鞘翅目多样性逐渐降低。     

西双版纳热带雨林不同生长时期昆虫群落结构的初步比较

１９９７年９月和１９８８年４月,采用样地调查法对西双版纳热带季节雨林林窗期、建群期、成熟期森林昆虫进行调查,共获得昆虫２４５５头,分属１５目。对昆虫群落类群组成、数量结构及群落多样性和相似性研究结果表明：双翅目、鞘翅目和膜翅目成为３种生境昆虫群落的主要优势类群,鳞翅目为常见类群。在雨林循环生长最旺盛阶段的建群期次生林昆虫群落物种丰富度和优势度指数最高;林窗期先锋次生林最低,均匀性指数较高;成熟期原     

南京地区外来植物一年蓬上访花昆虫的多样性及其访花选择性的影响因素分析

为揭示外来植物一年蓬Erigeron annuus上的本土访花昆虫多样性和影响访花行为的因素, 本研究在南京郊区进行了连续2年的野外调查, 采用跨栏模型分析了环境因素如何影响昆虫的访花选择性, 即接受概率（测度是否接受一年蓬花）和访问频数（测度接受一年蓬花的程度）。调查发现, 访问一年蓬花的昆虫共计9目54科145种, 其中, 科丰富度占优势的是膜翅目、 鳞翅目和鞘翅目（均占总科数的20.75%）, 其次是双翅目（18.87%）和半翅目（13.21%）; 物种丰富度占优势的是双翅目（26.39%）, 其次是膜翅目（18.75%）、 半翅目（18.75%）、 鞘翅目（17.36%）和鳞翅目（15.38%）。多数目的物种丰富度在6-7月最高, 9月最低, 仅双翅目（食蚜蝇为主）在5月最高。运用跨栏模型对物种优势度最大的半翅目、 膜翅目和双翅目等的访花个体数量及其影响因素的分析结果表明： 影响半翅目和膜翅目对一年蓬花访问倾向（接受概率）的因素多于影响其访问频数的因素, 由此预测这些访花昆虫可能参考较多因素做出是否接受一年蓬花, 而依据较少线索做出访问程度的访花行为决策; 一年蓬植株密度影响半翅目和膜翅目昆虫的接受概率, 而花密度影响半翅目和双翅目昆虫的接受概率和访问频数, 说明靶标植物花的特性可能对访花昆虫的访花行为决策起主要作用。     

Analysis of the diet of Natterer's bat Myotis nattereri and the common long-eared bat Plecotus auritus in the West of Ireland

The diets of Natterer's bat Myotis nattereri and the common long-eared bat Plecotus auritus were investigated at a nursery colony of each species by analysis of droppings collected monthly from May to September. Respectively, 68% and 42% of the diets comprised items presumed to have been gleaned from foliage or other surfaces: diurnal insects, insects which rarely fly, and non-flying arthropods. Such surfaces included the ground: centipedes were eaten by both bats, and the muscid, Scatophaga stercoraria , usually associated with cattle dung, was a common prey. Indeed, the prevalence of cattle-farming around both of the bat roosts almost certainly contributed indirectly, in the form of S. stercoraria , to a significant part of the Diptera consumed. The chief food of M. nattereri was the larger Diptera, but Trichoptera, Hymenoptera and Arachnida were also important. Lepidoptera, Coleoptera and Hemiptera were minor prey, with Dermaptera and Chilopoda taken occasionally. Diptera, closely followed by Lepidoptera, together accounted for nearly two-thirds of the diet of P. auritus. Also taken, in descending order of importance, were Trichoptera, Arachnida, Chilopoda, Coleoptera, Dermaptera, Hymenoptera and Hemiptera. Plecotus auritus , but not M. nattereri , was evidently able to take a few small insects such as aphids and lesser nematoceran Diptera.     

Insect taxonomic diversity in the Russian Far East

The insect fauna of the Russian Far East comprises 634 families from 31 orders. The estimated species number is 31500. The largest orders are Hymenoptera (76 families, 9000 estimated species), Diptera (120 families, 8000 estimated species), Coleoptera (114 families, 5500 estimated species), and Lepidoptera (81 families, 5000 estimated species). The fractions of the main insect orders in the fauna of the Russian Far East correspond to those in the Holarctic temperate zone. The high biodiversity of insects in the Russian Far East results from the position of this region extending across several climatic zones. There are four levels of diversity both for the families and for the species, corresponding to the tundra, taiga, the transitional area between taiga and broadleaved forests, and the broadleaved forest zone. The number of insect families increases by 3 times while that of species increases by 20 times from the tundra to the broadleaved forests. Differentiation of the insect fauna of the Russian Far East results from the recent climatic situation (the influence of the Pacific monsoon) and the geologic history (broadleaved forest refugia resulting from the absence of complete ice cover during Pleistocenic glaciation in the south of the Russian Far East); it reflects deep faunistic connections of the eastern Palaearctic with the Nearctic and Oriental Regions. The mountain areas in the North Pacific are the refugia of the Mesozoic and Tertiary insect faunas. The Pacific may have substantially reduced the Cenozoic aridization in the northern hemisphere, which was one of the important factors of formation of the recent biota in the Palaearctic and Nearctic regions.     

太阳能灭虫器对吐鲁番葡萄产区害虫的诱捕效果及对天敌安全性评价

本文研究了FWS-DBL-1新型太阳能灭虫器在320～580、360、400、460和520 nm 5种不同波长下对吐鲁番葡萄产区害虫的诱捕效果及对天敌安全性。结果表明:在5种波长下,灭虫器诱捕昆虫的种类相似,以鞘翅目、鳞翅目、半翅目、脉翅目、双翅目、直翅目和膜翅目等为主。诱捕的主要昆虫是蜉金龟Aphodius sp.、白云斑鳃金龟Polyphylla alba vicaria Semenov、额喙丽金龟Adoretus nigriforns Steven、毛喙丽金龟Adoretus hirsutus Ohaus、绣罗夜蛾Leucanitis picta Christoph和淘赏夜蛾Catocala puerpera Giorna等。其中:灭虫器在400 nm波长下的诱捕量最多,其次是320～580 nm和360 nm波长。综合分析比较:400 nm波长对鞘翅目害虫的诱捕效果最好,360 nm波长对鳞翅目和双翅目害虫的诱捕能力最强,520 nm波长对半翅目害虫的诱捕效果最好。对天敌的安全性研究表明:FWS-DBL-1太阳能灭虫器对天敌有一定的诱捕作用,益害比为1∶4～1∶5。诱捕量较多的是步甲科和草蛉科的天敌,占天敌总诱捕量的85.82%。在这5个波长中,360 nm波长下,灭虫器对天敌的诱捕作用最小,对天敌的安全性相对较高。     

Fruit sizes and the structure of frugivorous communities in a New Guinea lowland rainforest

A community of frugivorous insects was studied by rearing of 25 565 individual insects representing three orders (Coleoptera, Lepidoptera and Diptera except Drosophilidae) from 326 woody plant species in a lowland rainforest in Papua New Guinea. Fruits from 19.3% of plant species were not attacked by any insect order, 33.4% of plant species were attacked by a single order, 30% by two orders and 17.2% by all three orders. The likelihood of attack by individual orders was positively correlated so that a higher proportion of plant species than expected suffered either no attack at all or was attacked by all three insect orders. Fruits from most of the plant species exhibited low rates of attack and low densities of insects. One kilogram of fruit was attacked on average by 11 insects, including three to four Coleoptera, six Diptera and one Lepidoptera. Thus, we reared on average one insect from 10 fruits, including one Diptera from 14 fruits, one Coleoptera from 22 fruits and one Lepidoptera from 100 fruits. Only 72 out of the 326 plant species hosted more than one insect per 10 fruits, and only seven species supported a density of greater than one insect per fruit. Our results suggest that specialized insect seed predators are probably too rare to maintain the diversity of vegetation by density‐dependent mortality of seeds as suggested by the Janzen–Connell hypothesis. Fruit weight, fruit volume, mesocarp volume, seed volume and fleshiness had no significant effect on the probability that a fruit would be attacked by an insect frugivore. However, fruits attacked by Diptera were significantly larger and had larger volume of both mesocarp and seeds than fruits attacked by Coleoptera and Lepidoptera.     

桂林两江国际机场内草坪动物与鸟类关系

2005年7月～2006年7月对桂林两江国际机场草坪动物及鸟类进行调查.共记录到鸟类9目23科48种,其中优势种是:田鹨、家燕、小云雀、棕背伯劳、黑卷尾、针尾沙锥、红隼、黑翅鸢;记录到昆虫13目76科,其中优势种有:直翅目、鞘翅目、双翅目、膜翅目、半翅目等昆虫和各种蜘蛛.鸟类数量和昆虫数量存在密切联系,鸟类数量峰值和昆虫数量峰值有部分重叠,说明昆虫数量对鸟类数量有影响.严格控制草坪昆虫数量能有效控制机场草坪的鸟类数量.蛙鼠类对草坪鸟类数量影响不大.     

Floral traits and phenology drive pollinators diversity and pollinators visits in selected endemic Elaeocarpus spp. of the Western Ghats

The detailed studies on phenology, floral morphology in relation to pollination of six endemic species of Elaeocarpus were carried out at different forest areas of Southern Western Ghats, India. The pollinators were attracted by morphology and nature of flowers with different types of rewards offered by the flowers of Elaeocarpus. The number of flowers per tree has determined its type of pollinators, in which, Coleoptera and Diptera visitation was significant and positive relation with increased number of flowers per tree. However, the visitation by Hymenoptera and Lepidoptera were negatively related with flower numbers per tree. The visitation of Diptera was significant and positive relation with number of petal divisions (fringes) of flowers. Also, it has predicted that higher number of petal divisions may act as an optical advertisement to the floral visitors. Like this, the size of the flower was also one of the factors to attract the members Diptera. Also, the size of the flower was negative and significant relation with members of Hymenoptera. Moreover, the visitation of Coleoptera and Lepidoptera were also affected by the size of the flowers. The pollen production was also positive and significant relation with the visitation of Hymenoptera and Coleoptera. Therefore, it may be assumed that the primary reward for Hymenoptera and Coleoptera will be pollen grains.     

银川不同湿地陆生昆虫群落多样性与稳定性

【目的】调查和分析银川不同湿地陆生昆虫群落结构组成、功能多样性及其稳定性变化。【方法】2016年5-10月选取银川黄河湿地(HH)、鸣翠湖湿地(MCH)、芦花台湿地(LHT)、水洞沟湿地(SDG)4种湿地生境,采用棋盘式扫网和陷阱捕捉的方法进行昆虫采集。根据调查数据进行昆虫群落结构多样性分析、主成分分析和聚类分析。【结果】4种湿地生境共采集昆虫38 668头,隶属13目97科370种。双翅目、同翅目、膜翅目在4种生境中均为优势类群。植食性(Ph)昆虫功能团的科数和种数在4种生境昆虫群落中占比均最大。植食性-中性昆虫(Ph-Ne)间个体数在4种生境下均存在显著负相关(P<0.01);植食性-捕食性昆虫(Ph-Pr)间个体数在MCH生境下存在显著正相关(P<0.05);中性-捕食性昆虫(Ne-Pr)间个体数在MCH生境下存在显著负相关(P<0.01),在LHT生境下存在显著负相关(P<0.05);4种功能团结构的其他组合的个体数在4种生境下均不存在显著相关性。主成分分析结果表明,捕食性类群是4个类群中影响构成昆虫群落组成的主要成分。同种功能团在4种生境下的多样性分析结果表明,捕食性功能团(Pr)与寄生性功能团(Pa)在4种生境群落中的群落丰富度、均匀程度［辛普森指数(Simpson index)］差异性显著(P<0.05),而植食性功能团(Ph)与中性功能团(Ne)的群落丰富度、均匀程度的差异性不显著(P>0.05);中性功能团(Ne)在4种生境群落中个体出现的不确定程度［香农-维纳指数(Shannon-Wiener index)］差异性不显著(P>0.05),在4种生境的均匀度指数(Pielou evenness index)差异性显著(P<0.05),其余3个功能团在4种生境下的香农-维纳指数均差异性显著(P<0.05),在4种生境下的均匀度指数均差异性不显著(P>0.05)。4种生境昆虫群落特征指数的聚类分析分为2类,永久性湿地HH和MCH为第1类,季节性湿地LHT和SDG为第2类。Ss/Si和Sa/Sp两个稳定性指标均显示MCH昆虫群落稳定性最高,4种生境昆虫群落最稳定的时期是5和9月。【结论】双翅目和膜翅目昆虫在银川不同湿地生境中均为优势类群,可作为环境指示参考;昆虫群落稳定性最好的湿地类型为永久性湖泊湿地;不同生境昆虫群落多样性随季节时序变化,在银川最稳定的时期是5和9月。气候因子、环境因素如何驱动各湿地昆虫群落多样性及稳定性的变化因素还有待开展研究。     

Insect Pollinators of Crops and Fruits in Arunachal Pradesh,Eastern Himalaya: Rich Diversity in Flowers with Yellow Anther

A study on the insect pollinators of the commercial crops and fruits in Arunachal Pradesh, Eastern Himalaya was conducted from June, 2015 to May, 2016. For this, monitoring and sampling of insect pollinators in the important crops and fruits cultivated in the selected regions were done from 5 a.m. to 6 p.m. for 9 days covering 9 spots in each crop and fruit during peak blooming period. In each spot, 10 replications of 100 m² were considered as sample size. During the study, 57 species of insects belonging to the order Hymenoptera, Lepidoptera, Diptera and Coleoptera were documented in 11 crop species and 7 fruit species. The number of species recorded from the order Diptera, Hymenoptera, Lepidoptera and Coleoptera was 23, 18, 15 and 1 respectively. While analysing the floral color discrimination, the highest species richness of insect pollinators was recorded in flowers with yellow anther color. This result coincided with Brassica juncea, as both Simpson and Shannon index showed the highest species richness in B. juncea with 19 species of insect pollinators belonging 3 orders. From the results, it is evident that, in eastern Himalayan region these native insect pollinators play significant role for yielding good quality sustainable organic crops and fruits. Further, this study leads to hypothesize that the reward patterns of flowers are ‘advertised’ in the color of the anthers to control indirectly the gamete export mediated by insect pollinators.