Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1073/pnas.1920012117 |
Nutrient dilution and climate cycles underlie declines in a dominant insect herbivore | |
Welti, Ellen A. R.1; Roeder, Karl A.2; de Beurs, Kirsten M.3; Joern, Anthony4; Kaspari, Michael1 | |
2020-03-31 | |
发表期刊 | PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA |
ISSN | 0027-8424 |
出版年 | 2020 |
卷号 | 117期号:13页码:7271-7275 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Evidence for global insect declines mounts, increasing our need to understand underlying mechanisms. We test the nutrient dilution (ND) hypothesis-the decreasing concentration of essential dietary minerals with increasing plant productivity-that particularly targets insect herbivores. Nutrient dilution can result from increased plant biomass due to climate or CO2 enrichment. Additionally, when considering long-term trends driven by climate, one must account for large-scale oscillations including El Nino Southern Oscillation (ENSO), North Atlantic Oscillation (NAO), and Pacific Decadal Oscillation (PDO). We combine long-term datasets of grasshopper abundance, climate, plant biomass, and end-of-season foliar elemental content to examine potential drivers of abundance cycles and trends of this dominant herbivore. Annual grasshopper abundances in 16- and 22-y time series from a Kansas prairie revealed both 5-y cycles and declines of 2.1-2.7%/y. Climate cycle indices of spring ENSO, summer NAO, and winter or spring PDO accounted for 40-54% of the variation in grasshopper abundance, mediated by effects of weather and host plants. Consistent with ND, grass biomass doubled and foliar concentrations of N, P, K, and Na-nutrients which limit grasshopper abundance-declined over the same period. The decline in plant nutrients accounted for 25% of the variation in grasshopper abundance over two decades. Thus a warming, wetter, more CO2-enriched world will likely contribute to declines in insect herbivores by depleting nutrients from their already nutrient-poor diet. Unlike other potential drivers of insect declines-habitat loss, light and chemical pollution-ND may be widespread in remaining natural areas. |
英文关键词 | insect decline global change grasshopper Acrididae grassland |
领域 | 地球科学 ; 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000523188100047 |
WOS关键词 | CARBON-DIOXIDE ; POPULATION TRENDS ; ELEVATED CO2 ; COMMUNITIES ; SCALE ; BIODIVERSITY ; GRASSLAND ; ABUNDANCE ; DENSITY ; WEATHER |
WOS类目 | Multidisciplinary Sciences |
WOS研究方向 | Science & Technology - Other Topics |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/249732 |
专题 | 资源环境科学 |
作者单位 | 1.Univ Oklahoma, Dept Biol, Geog Ecol Grp, Norman, OK 73019 USA; 2.Univ Illinois, Dept Entomol, Urbana, IL 61801 USA; 3.Univ Oklahoma, Dept Geog & Environm Sustainabil, Norman, OK 73019 USA; 4.Kansas State Univ, Div Biol, Manhattan, KS 66506 USA |
推荐引用方式 GB/T 7714 | Welti, Ellen A. R.,Roeder, Karl A.,de Beurs, Kirsten M.,et al. Nutrient dilution and climate cycles underlie declines in a dominant insect herbivore[J]. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,2020,117(13):7271-7275. |
APA | Welti, Ellen A. R.,Roeder, Karl A.,de Beurs, Kirsten M.,Joern, Anthony,&Kaspari, Michael.(2020).Nutrient dilution and climate cycles underlie declines in a dominant insect herbivore.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,117(13),7271-7275. |
MLA | Welti, Ellen A. R.,et al."Nutrient dilution and climate cycles underlie declines in a dominant insect herbivore".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 117.13(2020):7271-7275. |
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