The US Department of Defense (DOD) manages over 10.1 million ha of land, much of which is used for training military personnel.
However, vast sections receive little or no use, and military lands have become refuges for many species. At Fort McCoy, Wisconsin,
USA, populations of the endangered Karner blue butterfly (Lycaeides melissa samuelis) are found in oak and pine barren communities where wild lupine (Lupinus perennis), a perennial forb required by Karner blue butterfly larvae, still occurs. Oak and pine barren communities are disturbance-dependent,
and the barrens ecosystems in the Midwest have declined in extent by 98% because of fire suppression, succession, and habitat
fragmentation. We studied the effects of disturbance by military manuever training on the density of lupine and Karner blue
butterfly at Fort McCoy. We also wanted to determine whether military training activity could enhance Karner blue butterfly
habitat.
At locations where tracked vehicles had driven through lupine patches, the abundance of lupine and nectar-producing plants
was greater in the median strip between vehicle ruts than in vehicle ruts or 5 m outside the vehicle ruts. The proportion
of lupine stems with Karner blue butterfly larvae feeding sign (the ratio of stems fed upon to stems examined) was greater
in areas where military vehicles had traveled than where they had not. The proportion of lupine stems with feeding sign and
lupine stem density was also positively related to the occurrence of prior bivouacs and fires caused by military munitions.
Shrub and forest canopy abundance were lower in areas traveled by tracked vehicles. At the scale of the lupine patch, lupine
abundance and the proportion of lupine stems with feeding sign were positively correlated with military training activities,
suggesting that maintenance of lupine habitat can be achieved in concert with military training. 相似文献
Objective: A number of training programs that seek to improve driving performance among older drivers are available accompanied by a growing interest in their effectiveness. The purpose of the present investigation was to examine the combined effect of (1) basic in-class training (BT); (2) on-road training with individualized feedback (OR); and (3) training on a driving simulator (S).
Methods: Using a randomized controlled trial study design, 78 older drivers were randomly assigned to one of 3 groups (BT, BT + OR, or BT + OR + S). All participants completed a pre- and postintervention on-road driving evaluation on a standardized route. The driving evaluations were recorded using video and Global Positioning System (GPS) equipment and were scored by a blind assessor.
Results: The results indicated a significant reduction of approximately 30% in overall number of driving errors/omissions among participants in the BT + OR and the BT + OR + S groups in comparison to participants in the BT group.
Conclusions: This study adds to the mounting evidence demonstrating the effectiveness of individualized driver training in improving safe driving among older adults. 相似文献