气候变化领域集成服务门户(CCPortal): Chronic insect herbivores accelerate litter decomposition and nutrient recycling rates along an environmental/herbivory gradient in northern Patagonia

CCPortal

DOI	10.1016/j.foreco.2020.118534
	Chronic insect herbivores accelerate litter decomposition and nutrient recycling rates along an environmental/herbivory gradient in northern Patagonia
	Piazza M.-V.; Mazía N.; Kitzberger T.; Chaneton E.J.
发表日期	2021
ISSN	0378-1127
卷号	479
英文摘要	Canopy insects are the main consumers in forests, and understanding their ecological role includes considering their effects on litter decomposition and nutrient cycling. We experimentally evaluated how litter decomposition is shaped by the decomposition environment and by litter traits shaped by forest moisture origin and chronic insect activity. We selected 4 forest stands at the driest and wettest extremes of beech (Nothofagus pumilio) forests in northwest Patagonia (mean annual rainfall 800 and 3000 mm yr−1 respectively). In two stands from each extreme, we performed three litterbag decomposition experiments. Experiment 1 included a reciprocal litter transplant between dry and wet stands, replicated in 2 different years for 24 and 12 months. Litterbags comprised the “Natural” proportion of undamaged and damaged leaves from the local insect community. Experiments 2 and 3 examined leaf insect damage effects on litter decomposition, respectively “in situ” and under controlled conditions. Here, we included three types of litterbags: 1- “Natural” (described above), 2- only insect-damaged litter, and 3- only healthy (undamaged) litter. Reciprocal transplants showed that litter decomposition was mostly controlled by litter origin and less by the decomposition environment (wet or dry forests). But, challenging predictions based on litter quality produced under water limiting environments, “Natural” litter chemical quality did not differ between forests. Even, when compared under the same decomposition environment (wet or dry forest), “Natural” litter from dry forests decomposed 31% faster and released 109% more N than “Natural” litter from wet forests. “Natural” litter from dry forests had a higher herbivory frequency and higher dominance of endophagous insects than wet stands. The high proportion of damaged litter in dry forests decreased “Natural” litter C:N ratio to match the chemical quality of “Natural” litter from wet forests. Experiment 2 showed that, in both wet and dry forests, damaged litter decomposed 31% faster than undamaged litter (in situ). Insect damage also reduced 90% N retention, but only in dry forests. Our results suggest that differences in insect communities living in contrasting environments could act as key drivers in shaping the recycling of organic matter, counteracting environmental differences between forests. © 2020 Elsevier B.V.
英文关键词	Chronic insect folivory; Ecosystem function; Forest moisture; Nutrient recycling; Temperate forest
语种	英语
scopus关键词	Decomposition; Nutrients; Recycling; Chemical quality; Controlled conditions; Ecological roles; Environmental difference; Litter decomposition; Northern patagonia; Nutrient cycling; Nutrient recycling; Forestry; annual variation; decomposition; environmental factor; herbivore; litter; nutrient cycling; Damage; Experimentation; Forestry; Forests; Insects; Nutrients; Quality; Recycling; Patagonia; Fagus; Hexapoda; Nothofagus pumilio
来源期刊	Forest Ecology and Management
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/154942
作者单位	Universidad de Buenos Aires, Facultad de Agronomía, Departamento de Producción Vegetal, Cátedra de Dasonomía, Av. San Martín 4453, Buenos Aires, 1417, Argentina; Laboratorio Ecotono, INIBIOMA-CONICET and CRUB, Universidad Nacional del Comahue, Quintral 1250, Bariloche, Río Negro 8400, Argentina; Universidad de Buenos Aires, Consejo Nacional de Investigaciones Científicas y Técnicas, Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA), Facultad de Agronomía, Av. San Martín 4453, Buenos Aires, 1417, Argentina
推荐引用方式 GB/T 7714	Piazza M.-V.,Mazía N.,Kitzberger T.,et al. Chronic insect herbivores accelerate litter decomposition and nutrient recycling rates along an environmental/herbivory gradient in northern Patagonia[J],2021,479.
APA	Piazza M.-V.,Mazía N.,Kitzberger T.,&Chaneton E.J..(2021).Chronic insect herbivores accelerate litter decomposition and nutrient recycling rates along an environmental/herbivory gradient in northern Patagonia.Forest Ecology and Management,479.
MLA	Piazza M.-V.,et al."Chronic insect herbivores accelerate litter decomposition and nutrient recycling rates along an environmental/herbivory gradient in northern Patagonia".Forest Ecology and Management 479(2021).