Dick Proenneke
Transcription
Dick Proenneke
Lake Clark National Park Repeat Photography in the Twin Lakes Area Dick Proenneke Alan Bennett Retaking historic photographs is a valuable means of assessing landscape change. In the fall of 2010, Alan Bennett and Monroe Robinson spent several weeks in Upper Twin Lake reviewing many of Dick Proenneke’s beautiful photographs and trying to determine from where they were taken. The following eight photo pairs are a few that Alan and Monroe were able to relocate and retake. They provide a means to understand and appreciate plant successional changes and landscape changes in Lake Clark National Park and Preserve as a result of climate change over the last 40 years. June 2011 Scanning for Big Game Dick Proenneke, ~ May 1968 Dick Proenneke stands on a windswept bench along the southwest side of Upper Twin Lake while scanning the countryside for big game (D. Proenneke 1968). Although one of the earliest photographs taken by Dick, little change is visible in the coverage of arctic willow and lichens on this dry gravel bench during the past 42 years (A. Bennett 2010). White spruce in the foreground is taller and has increased in density along a moister and more sheltered site down lake (distant left). Orientation: Looking west from south side of Upper Twin towards Lower Twin Lake Location coordinates: 60 ° 37’32’’ N 153 ° 52’55’’ W Alan Bennett/NPS, August 26, 2010 1 Hope Creek Canyon A Dick Proenneke, ~ September 1969 View looking south up Hope Creek Canyon from near the Proenneke Site, Upper Twin Lake, (D. Proenneke 1969). Perhaps Dick’s most traveled route at Twin Lakes, this trail leads to “Teetering Rock” and a bench overlooking Hope Creek Valley. In 2010 (A. Bennett), taller and thicker shrubs (A) are visible on both sides of the Creek and spruce appear higher up the slopes. A Orientation: Looking southeast up Hope Creek Canyon from near Proenneke Cabin Location coordinates: 60°38’42’’ N 153°48’37’’ W Alan Bennett/NPS, August 22, 2010 2 Emerson Creek Waterfall A Dick Proenneke, ~September 1978 Dick Proenneke pauses below the upper waterfall on Emerson Creek, Upper Twin Lake (D. Proenneke 1978). In 2010 (A. Bennett), more white spruce is visible and several large clones of alder have appeared (A). Also note the increase in woody vegetation covering the slope above and to the left of the falls. The two photographs were taken at approximately same period of leaf phenology. A Orientation: Looking north-northwest at upper waterfall of Emerson Creek Location coordinates: 60 ° 38’55’’ N 153 ° 55’35’’ W Alan Bennett/NPS, August 25, 2010 3 Following Game Trails Dick Proenneke, ~June 1982 South side of Upper Twin Lake looking northeast toward Carrithers Point and the head of the lake (D. Proenneke 1982). Dick routinely followed game trails here while traveling between his cabin and the stream that connects Lower and Upper Twin Lake. In 2010 (A. Bennett), patches of bare ground and game trails are no long visible. White spruce, willow and dwarf birch have increased in height and density. Orientation: Looking northeast toward Carrithers Point from south side of Upper Twin Lake Location coordinates: 60 ° 37’36’’ N 153 ° 52’12’’ W Alan Bennett/NPS, August 26, 2010 4 Fox Ponds, South Side Dick Proenneke, ~June1980 Continuation of Fox Ponds; polygonal patterns on the substrate and sorted stone circles suggest that permafrost (not visible in photos), present when Dick first arrived at Twin Lakes in 1967, has melted and resulted in the relatively rapid drying of the these ponds and subsequent colonization by grasses and shrubs. Orientation: Looking northnortheast at Fox Ponds Location coordinates: 60 ° 37’24’’ N 153 ° 53’33’’ W Alan Bennett/NPS, August 25, 2010 8 Standing on Teetering Rock A Dick Proenneke, ~August 1991 A View near “Teetering Rock” looking across Hope Creek delta toward Falls Mountain, Upper Twin Lake (D. Proenneke 1991). In 2010 (A. Bennett), little change is evident in this relatively recent photograph. Dwarf birch is taller and more widespread (A). Note insect defoliation on dwarf birch, which was widespread across the park in 2010. Orientation: Looking west across Hope Creek Delta from “Teetering Rock” Location coordinates: 60 ° 38’40’’ N 153 ° 48’15’’ W Alan Bennett/NPS, August 13, 2010 5 Change in Fox Ponds B A Dick Proenneke, ~July 1987 B A The “Fox Ponds” along the southwest end of Upper Twin Lakes were so named by Dick Proenneke because they supported an active fox den during 1969-80 (D. Proenneke 1987). Presumably, breeding waterbirds provided a prey resource for the foxes. In 2010 (A. Bennett), only 2 of the 5 ponds contained surface water and much of the basins has been colonized by herbaceous and woody vegetation (A). Also note the decrease in size of the hanging glacier in the picture (B). Orientation: Looking northeast at Fox Ponds Location coordinates: 60 ° 37’26’’ N 153 ° 53’33’’ W Alan Bennett/NPS, August 25, 2010 6 Fox Ponds, Southwest Side A B Dick Proenneke, ~September 1984 Continuation of the “Fox Ponds” along the southwest end of Upper Twin Lakes (D. Proenneke 1984). In 2010 (A. Bennett), the largest of the ponds (A) contained no surface water and support a thick stand of grass and seedling spruce around the perimeter. Dwarf birch and spruce have increased in height and density around the perimeter of the basins. Note the appearance of a large alder (B) not visible in 1984. A B Orientation: Looking northwest at Fox Ponds Location coordinates: 60 ° 37’26’’ N 153 ° 53’33’’ W Alan Bennett/NPS, August 25, 2010 7