Wind effects on web structure of grass spiders Agelenopsis actuosa

Q3 Agricultural and Biological Sciences
Jacob C. Ulrich
{"title":"Wind effects on web structure of grass spiders Agelenopsis actuosa","authors":"Jacob C. Ulrich","doi":"10.13156/arac.2021.18.9.993","DOIUrl":null,"url":null,"abstract":"Abstract Habitat selection can be influenced by abiotic factors such as rain and wind. Spiders build webs that are subjected to wind, thus making habitat selection that much more important for individual spiders. I examined the webs of the grass spider Agelenopsis actuosa (Gertsch & Ivie, 1936), to determine whether they differed in shape, size, and attachment points in short versus tall vegetation in the same general area. I hypothesized that short-grass webs would be larger in diameter, closer to the ground, have more numerous attachments to vegetation, and have specific orientations that accounted for the dominant wind directions. Webs in short grass were significantly shorter in diameter (mean short = 23 ± 6 cm, mean tall = 25 ± 6 cm), lower to the ground (mean short = 7 + 3 cm, mean tall = 17 + 5 cm), and had more numerous attachments (mean short = 24 + 6 attachments, mean tall = 10 + 2 attachments) than webs in tall grass. Short-grass webs were significantly oriented towards north while tall-grass webs showed no significant web orientation. My findings suggest that short-grass webs were smaller because of the wind, and are a predictable circular shape with more attachments. Tall-grass webs were a longer oval in shape, with fewer attachments. Webs are possibly more rigid in short grass with significant orientation perpendicular to the dominant wind direction, possibly for spider thermoregulation.","PeriodicalId":38197,"journal":{"name":"Arachnology","volume":"39 3 1","pages":"993 - 997"},"PeriodicalIF":0.0000,"publicationDate":"2021-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"2","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Arachnology","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.13156/arac.2021.18.9.993","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"Agricultural and Biological Sciences","Score":null,"Total":0}
引用次数: 2

Abstract

Abstract Habitat selection can be influenced by abiotic factors such as rain and wind. Spiders build webs that are subjected to wind, thus making habitat selection that much more important for individual spiders. I examined the webs of the grass spider Agelenopsis actuosa (Gertsch & Ivie, 1936), to determine whether they differed in shape, size, and attachment points in short versus tall vegetation in the same general area. I hypothesized that short-grass webs would be larger in diameter, closer to the ground, have more numerous attachments to vegetation, and have specific orientations that accounted for the dominant wind directions. Webs in short grass were significantly shorter in diameter (mean short = 23 ± 6 cm, mean tall = 25 ± 6 cm), lower to the ground (mean short = 7 + 3 cm, mean tall = 17 + 5 cm), and had more numerous attachments (mean short = 24 + 6 attachments, mean tall = 10 + 2 attachments) than webs in tall grass. Short-grass webs were significantly oriented towards north while tall-grass webs showed no significant web orientation. My findings suggest that short-grass webs were smaller because of the wind, and are a predictable circular shape with more attachments. Tall-grass webs were a longer oval in shape, with fewer attachments. Webs are possibly more rigid in short grass with significant orientation perpendicular to the dominant wind direction, possibly for spider thermoregulation.
风对草蛛网结构的影响
生境选择受雨、风等非生物因素的影响。蜘蛛结的网受风的影响,因此对单个蜘蛛来说,栖息地的选择更加重要。我检查了草蛛Agelenopsis actuosa (Gertsch & Ivie, 1936)的网,以确定它们在同一地区的矮和高植被上的形状、大小和附着点是否不同。我假设短草网直径更大,离地面更近,与植被有更多的附着物,并且有特定的方向,可以解释主要的风向。矮草网直径短(平均短= 23±6 cm,平均高= 25±6 cm),离地低(平均短= 7 + 3 cm,平均高= 17 + 5 cm),附着物多(平均短= 24 + 6个,平均高= 10 + 2个),显著高于高草网。矮草网向北取向显著,而高草网向北取向不显著。我的研究结果表明,由于风的影响,短草网更小,而且是一个可预测的圆形,有更多的附着物。高草网的形状较长,呈椭圆形,附着物较少。在垂直于主要风向的短草中,蜘蛛网可能更加坚硬,可能是为了调节蜘蛛的体温。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
求助全文
约1分钟内获得全文 求助全文
来源期刊
Arachnology
Arachnology Agricultural and Biological Sciences-Insect Science
CiteScore
1.70
自引率
0.00%
发文量
49
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信