Perent Acreage of Lowland Conifers低地針葉林面積百分比

1、proposed special conservation area (sca) for the lakewood and laona districts of the nicolet national forestjeanette jaskula, monica hauck-whealton, and sarah wielguswhat is the importance of a special conservation area?to maintain:- undisturbed water, soil, and air- diverse plant and animal communi

2、ties- habitat for threatened or endangered species dependent on large, undisturbed areas of land- undisturbed reference landscapessca goals preserve 10,000 acres within the lakewood and laona districts of the nicolet national forest as one patch or multiple patches include areas that can be converte

3、d to roadless areas include old-growth forest stands and riparian areasimportance of forestriparian buffers trap sediment and associated nutrients (road construction can be the largest source of sediment in forestry operations) moderate stream temperatures provide cover and important organic debris

4、used as food by stream invertebrates reduce the impacts of downstream flooding by reducing upstream flowgeneralized forest types conifers pine, balsam fir, hemlock, cedar, tamarack lowland hardwoods ash, elm, maple upland hardwoods birch, basswood, beech, maple aspen/birch nonforested areas sedge me

5、adows, shrub swamps, bogs, marshesforest types in lakewood scaconiferlowland hardwoodsupland hardwoodsaspen/birch52%14%10%24%average year of origin of forest types in lakewood sca1840186018801900192019401960198020002020year of originconiferslowland hardwoodsupland hardwoodsaspen/birch193219641924196

6、318%0%67%15%percent acreage of lowland conifers in lakewood sca1925193719301908northern white cedartamarackmixed swamp coniferscedar, aspen, paper birchyear of origin of mixed swamp conifers in lakewood sca1880-19001901-19201921-1940(81%)(6%)(13%)acres of old growth in forest types in lakewood sca05

7、0010001500200025003000total acresold growth coniferslowland hwupland hwaspen/birchacres65%24%32%29%total acreage in lakewood and sca for three timber types26%29%12%1.5%2.3%0.19%aspen-birchupland hardwoodsred, jack pineacreslakewoodscatiarella cordifolia foamflower endangered in wisconsin needs rich

8、deciduous woodscomprised of sugar maple, yellow birch, and basswoodwidnrbotrychium mormo goblin fern endangered in wisconsin associated with northern mesic forests, particularlysugar maple. indicator of nutrient rich sitesusf&wred-shouldered hawk threatened in wi needs unfragmented, mature flood

9、plain forests along rivers needs large pines20-70 ft. tallwidnrpercent acreage of forest types in laona scanon-forested7 %conifer28 %lowland hw8 %upland hw23 %aspen34 %average year of origin for each forest type in laona sca180018201840186018801900192019401960198020002020year of origin conifer lowla

10、nd hw upland hw aspen non-forested19221930193819761970percent acreage of forest types in laona sca vs. laona district0.05.010.015.020.025.030.035.040.0percent of forest typeupland hwaspenred / white pinedistrictsca38.2 %26.5 %4 %1.3 %2.7 %2.8 %total acreage comparisons for timber species0%10%20%30%l

11、aonascamixed hardwoodssugar maplequaking aspen26.6%23%7%1.7%0.1%0.2%sca distribution by typenon-forestedaspen-birchconifersupland hardwoods12.2%13.3%22.6%51.5%average year of origin by typeaspen-birchnon-forestedconifersupland hardwoods1971unk19351923average year of origin by type1850187018901910193

12、0195019701990coniferupland hardwoodaspen-birch193519231971percent of old-growth in sca by type050100150200250300350coniferslowland hardwoodsaspen-birchacres18%100%41%total acresold growthalgae-like pondweed (potamogeton confervoides) threatened in wisconsin grows in shallow water of inland lakeswidnrbrauns holly fern (polysticum braunii) threatened in wisconsin grows in sugar maple and basswood areas needs cool, shaded sites; sensitive to logging activity found in lakewood and laona districtswidnrfairy slipper (calypso bulbosa) threatened in wisconsin grows in swamp conifer and tamarack are