GSTDTAP  > 气候变化
DOI10.1016/j.foreco.2018.03.002
Influence of repeated fertilization on forage production for native mammalian herbivores in young lodgepole pine forests
Lindgren, Pontus M. F.1; Sullivan, Thomas P.2
2018-05-15
发表期刊FOREST ECOLOGY AND MANAGEMENT
ISSN0378-1127
EISSN1872-7042
出版年2018
卷号417页码:265-280
文章类型Article
语种英语
国家Canada
英文摘要

Stand thinning and fertilization are silvicultural practices designed to enhance wood and biomass production. Applications of nitrogen-based fertilizers make nutrients potentially available to all trees, plants, and wildlife in a given forest ecosystem, and therefore may affect productivity of forage plants for native mammalian herbivores. Species associated with areas of forest fertilization in temperate and boreal zones of North America include mule deer (Odocoileus hemionus), elk (Cervus elaphus), moose (Alces aloes), and woodland caribou (Rangifer tarandus), snowshoe hare (Lepus americanus), and several species of voles. Impacts of fertilization on forest plant species may have important consequences for the nutrition, cover, and consequent survival of these herbivores, particularly in winter. This study tested the hypothesis (H-1) that large-scale repeated fertilization, up to 20 years after the onset of treatments, would enhance the biomass production of forage plants, particularly grass, forb, shrub and tree species for native mammalian herbivores. A secondary hypothesis (H-2) predicted that mosses and terrestrial lichens would decline as part of the ground vegetation in fertilized stands. Study areas were located in lodgepole pine (Pinus contorta var. latifolia) stands near Summerland, Kelowna, and Williams Lake in south-central British Columbia, Canada. Each study area had eight replicate stands: four unfertilized, and four fertilized five times at 2-year intervals.


Mean biomass of total grasses responded dramatically starting in the first year after fertilization. Total forbs and herbs also followed this pattern, although not to a significant degree until after the second and third applications of fertilizer. All of the dominant grasses and forbs serve as summer forage for mule deer, moose, elk, and woodland caribou. Fireweed (Epilobium angustifoliwn), a preferred forage for mule deer, increased in fertilized stands. Grasses and dominant herbs in fertilized stands provide excellent forage and cover habitat for snowshoe hares and Microtus voles.


Mean biomass of total shrubs was not affected by fertilization. However, saskatoon berry (Amelanchier alnifolio), prickly rose (Rosa acicularis), and red raspberry (Rubus idaeus) increased significantly in biomass in fertilized stands. Willow (Salix spp.) also increased in biomass, but was variable across treatment stands. Snowshoe hares respond favourably to enhanced shrub growth for food and cover in fertilized stands. All of these shrubs are readily eaten by deer, moose, and elk, and their structural attributes provide security and thermal cover. Mean biomass of understory Douglas-fir (Pseudotsuga menziesii) responded positively to fertilization, but sub alpine fir (Abies lasiocarpa) and the three deciduous tree species did not. Dwarf shrubs such as kinnikinnick (Arctostaphylos uva-ursi), twinflower (Linnaea borealis), and dwarf blueberry (Vacciniwn caespitosum) declined in fertilized stands. Thus, H-1 was partially supported for some species. Increasing cover of grasses and nitrophilous herbs, and canopy cover from rapidly growing crop trees, in fertilized stands may have contributed to the decline of some dwarf shrubs. Mean crown volume index of total mosses and terrestrial lichens declined significantly in fertilized stands, thereby supporting H-2.


Mean biomass of total grasses (increase), R. acicularis (increase), and V. caespitosum (decline) were significantly affected after one application of fertilizer. Repeated applications of fertilizer may enhance biomass of some additional forage forbs and shrubs, but reduce biomass of some dwarf shrubs, mosses, and lichens.


英文关键词Fertilization Forage plants Herbs and shrubs Lodgepole pine forest Mammalian herbivores Native ungulates
领域气候变化
收录类别SCI-E
WOS记录号WOS:000430778900023
WOS关键词PLANT COMMUNITY ABUNDANCE ; RELATIVE HABITAT USE ; NITROGEN-FERTILIZATION ; MULE DEER ; SNOWSHOE HARES ; NPK FERTILIZATION ; CENTRAL INTERIOR ; BOREAL FORESTS ; LOBLOLLY-PINE ; GROWTH
WOS类目Forestry
WOS研究方向Forestry
引用统计
被引频次:3[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/23526
专题气候变化
作者单位1.Appl Mammal Res Inst, 11010 Mitchell Ave, Summerland, BC V0H 1Z8, Canada;
2.Univ British Columbia, Fac Forestry, Dept Forest & Conservat Sci, 2424 Main Mall, Vancouver, BC V6T 1Z4, Canada
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GB/T 7714
Lindgren, Pontus M. F.,Sullivan, Thomas P.. Influence of repeated fertilization on forage production for native mammalian herbivores in young lodgepole pine forests[J]. FOREST ECOLOGY AND MANAGEMENT,2018,417:265-280.
APA Lindgren, Pontus M. F.,&Sullivan, Thomas P..(2018).Influence of repeated fertilization on forage production for native mammalian herbivores in young lodgepole pine forests.FOREST ECOLOGY AND MANAGEMENT,417,265-280.
MLA Lindgren, Pontus M. F.,et al."Influence of repeated fertilization on forage production for native mammalian herbivores in young lodgepole pine forests".FOREST ECOLOGY AND MANAGEMENT 417(2018):265-280.
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