N addition suppresses the performance of grassland caterpillars (Gynaephora alpherakjj) by decreasing ground temperature

doi:10.1002/ecs2.1755

	N addition suppresses the performance of grassland caterpillars (Gynaephora alpherakjj) by decreasing ground temperature
	Yang, YHS; Xi, XQ; Zhong, XT; Eisenhauer, N; Sun, SC; Sun, SC (reprint author), Nanjing Univ, Sch Life Sci, Dept Ecol, 163 Xianlin Ave, Nanjing 210046, Jiangsu, Peoples R China.; Sun, SC (reprint author), Chinese Acad Sci, Key Lab Mt Ecol Restorat & Bioresource Utilizat, Chengdu 610041, Sichuan, Peoples R China.; Sun, SC (reprint author), Chinese Acad Sci, Ecol Restorat & Biodivers Conservat Key Lab Sichu, Chengdu Inst Biol, Chengdu 610041, Sichuan, Peoples R China.
刊名	ECOSPHERE
	2017
卷号	8 期号:3 页码:1-12
关键词	Feeding Activity Global Change Grassland Caterpillar Gynaephora Alpherakjj n Deposition Tibetan Plateau
DOI	10.1002/ecs2.1755
产权排序	4
文献子类	Article
英文摘要	Nitrogen deposition may stimulate plant biomass production and improve the quality of plant tissue, with both effects potentially facilitating herbivore growth and development. We hypothesized that simulated N deposition (N addition) would facilitate the growth and development of the grassland caterpillar Gynaephora alpherakjj, a notorious pest species in the alpine Tibetan meadow. We tested this hypothesis in two complementary experiments. The first field experiment tested N (ambient N levels vs. N addition) and caterpillar effects (caterpillar absence vs. presence) on plant community and sedge (major food plant species for caterpillars) biomass, growth, and development rate of the caterpillars, and microhabitat temperature. The second chamber experiment tested N addition effects through plant tissue quality on caterpillar performance. Results show that N addition increased the biomass and leaf N concentration of the sedge species, but decreased the feeding time, growth, and development rate of the caterpillars in the field experiment. The independent chamber experiment showed that increased leaf N facilitated the caterpillar growth and development. These results suggest that the reduced performance of caterpillars was not caused by an N addition-induced change in food quality. By contrast, N addition significantly reduced the ground surface temperature presumably because of canopy shading, as indicated by increased plant height and biomass in the N addition treatment. A significant quadratic relationship between ground surface temperature and the number of feeding caterpillars in the field experiment explained the difference in feeding time between the N addition and ambient N treatments. It can thus be concluded that N addition reduced caterpillar performance by stimulating plant growth leading to reduced ground surface temperatures, which decreased caterpillar feeding activity. Our results suggest that the effect of N deposition on abiotic factors could be critical to the growth, development, and survival of immobile herbivore species or the individuals at immobile stages that cannot quickly respond to changing microclimatic environments.
学科主题	Environmental Sciences & Ecology
项目编号	中国科学院山地生态恢复与生物资源利用重点实验室
语种	英语
资助机构	We thank Rui Cao, Kai He, and Xinwei Wu for field assistance and Qinghai-Tibetan Research Base of Southwest Normality University for providing research convenience. This study was supported by National Science Foundation of China (31530007, 31325004, and 31500395). ; National Science Foundation of China [31530007, 31325004, 31500395] ; We thank Rui Cao, Kai He, and Xinwei Wu for field assistance and Qinghai-Tibetan Research Base of Southwest Normality University for providing research convenience. This study was supported by National Science Foundation of China (31530007, 31325004, and 31500395). ; National Science Foundation of China [31530007, 31325004, 31500395] ; We thank Rui Cao, Kai He, and Xinwei Wu for field assistance and Qinghai-Tibetan Research Base of Southwest Normality University for providing research convenience. This study was supported by National Science Foundation of China (31530007, 31325004, and 31500395). ; National Science Foundation of China [31530007, 31325004, 31500395] ; We thank Rui Cao, Kai He, and Xinwei Wu for field assistance and Qinghai-Tibetan Research Base of Southwest Normality University for providing research convenience. This study was supported by National Science Foundation of China (31530007, 31325004, and 31500395). ; National Science Foundation of China [31530007, 31325004, 31500395]
内容类型	期刊论文
源URL	[http://210.75.237.14/handle/351003/29147]
专题	成都生物研究所_生态研究
通讯作者	Sun, SC (reprint author), Nanjing Univ, Sch Life Sci, Dept Ecol, 163 Xianlin Ave, Nanjing 210046, Jiangsu, Peoples R China.; Sun, SC (reprint author), Chinese Acad Sci, Key Lab Mt Ecol Restorat & Bioresource Utilizat, Chengdu 610041, Sichuan, Peoples R China.; Sun, SC (reprint author), Chinese Acad Sci, Ecol Restorat & Biodivers Conservat Key Lab Sichu, Chengdu Inst Biol, Chengdu 610041, Sichuan, Peoples R China.
推荐引用方式 GB/T 7714	Yang, YHS,Xi, XQ,Zhong, XT,et al. N addition suppresses the performance of grassland caterpillars (Gynaephora alpherakjj) by decreasing ground temperature[J]. ECOSPHERE,2017,8(3):1-12.
APA	Yang, YHS.,Xi, XQ.,Zhong, XT.,Eisenhauer, N.,Sun, SC.,...&Sun, SC .(2017).N addition suppresses the performance of grassland caterpillars (Gynaephora alpherakjj) by decreasing ground temperature.ECOSPHERE,8(3),1-12.
MLA	Yang, YHS,et al."N addition suppresses the performance of grassland caterpillars (Gynaephora alpherakjj) by decreasing ground temperature".ECOSPHERE 8.3(2017):1-12.