WINTER BROWSING BY MOOSE ON 2 BIRCH SPECIES - IMPACT ON FOOD RESOURCES
WINTER BROWSING BY MOOSE ON 2 BIRCH SPECIES - IMPACT ON FOOD RESOURCES
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DOI：
10.2307/3565866
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发表时间：
1989-05-01
期刊：
影响因子：
3.4
通讯作者：
BERGSTROM, R
中科院分区：
文献类型：
--
作者：
DANELL, K;BERGSTROM, R
研究了驼鹿模拟越冬对白桦、垂枝桦和B. pubescens进行了研究，在三年的重复修剪。对于第一个物种没有影响的修剪被认为是拍摄生物量产生，而同样的治疗减少拍摄生产后者。在这两个物种的拍摄大小增加作为修剪的反应。在一般情况下，目前的一年生长枝修剪树木含有较少的矿物质和醚提取的化合物，但更多的纤维比unclipped的。这些反应并不完全是由于芽大小的增加，因为我们发现在相同直径的芽部分有类似的变化。这些变化的属性的适口性和食物质量驼鹿的影响是难以评估的，但我们早期的研究表明，桦树驼鹿浏览（自然或模拟）的影响比对照桦树浏览。
The effect of simulated winter-browning by moose on the birches Betula pendula and B. pubescens was studied during three years of repeated clipping. For the first species no effect of clipping was seen on shoot biomass produced, while the same treatment decreased shoot production of the latter. Shoot size increased as a response to clipping in both species. In general, the current annual long-shoots of clipped trees contained less minerals and ether-extractable compounds, but more fibre than unclipped ones. These responses were not solely due to the increased shoot size as we found similar changes in shoot parts of the same diameter. The effect of these changed attributes for palatability and food quality to moose is difficult to evaluate, but our earlier studies have shown that birches affected by moose browsing (natural or simulated) are more browsed than control birches.