| 008 |
|
150226n^^^^^^^^xx^||||^o^^^^^|||^u^eng^d |
| 024 |
7 |
|a I 29.95: SFRC- 86/06 |2 sudoc |
| 245 |
00 |
|a The Impact of Wet Season & Dry Season Prescribed Fires on Miami Rock Ridge Pineland, Everglades National Park |h [electronic resource] |b Report SFRC-86/06 |y English. |
| 260 |
|
|a Homestead ; |a Florida : |b National Park Service, U.S. Department of the Interior, |c 1986. |
| 506 |
|
|a Please contact the owning institution for licensing and permissions. It is the user's responsibility to ensure use does not violate any third party rights. |
| 520 |
3 |
|a In the subtropical pine forests on oolitic limestone in Dade County,
Florida, Pinus elliottii var. densa grows over a species-rich understory
(more than 128 spp.) of shrubby hardwoods (mostly tropical evergreen
species), palms, and herbs, including several endemic taxa. Fires prevent
rapid conversion to hardwood forest. To compare the response of these
pinelands to burning during the lightning fire season (hot, wet, summer
months) and the management fire season (cooler, drier, winter months),
paired burns were conducted at two sites in Everglades National Park, one
burned 3.5 yr previously and the other 6 yr. Aboveground understory
biomass and nutrients were measured immediately before and after, and at
2, 7, and 12 mo after the four burns.
The burns topkilled all the understory vegetation. The fires volatilized
1-1.5 kg/m2 of organic matter and 5.7-9.5 g/m2 of N. Meteorological
inputs and symbiotic plus nonsymbiotic fixation should easily replace N
lost in the burns. Losses of P, K, Ca, and Mg were not detectable except
for K in one of the burns.
The rapid understory recovery was almost entirely vegetative regrowth of
the topkilled plants. Pine seedlings were abundant after the wet season
burns, however. Herbs and palms recovered dry mass more rapidly than
hardwoods and reached preburn levels within 1 yr. Hardwoods recovered
only 18-39% of their preburn biomass. Total understory vegetation
recovery was 27-63% of initial amounts, but leaves recovered 58-93%. Net
primary productivity the first year after burning was 144-200 g/m2.
Recovery of nutrients was more rapid than biomass because of higher
nutrient concentrations in regrowth tissues. Some herb and palm nutrient
standing crops reached preburn levels within 2 mo.
After the burns litter mass and nutrients often showed an initial decrease
before recovery began. At 1 yr litter mass was 42-62% of the preburn
amount. Annual pine needlefall averaged 260 and 320 g/m2 at the two
sites.
The amount of hardwood recovery was not determined by season of burning;
higher fire temperatures (wet season burn in one case, dry season burn in
the other) resulted in less recovery. |
| 533 |
|
|a Electronic reproduction. |c Florida International University, |c South Florida Natural Resource Center, |d 2015. |f (dpSobek) |n Mode of access: World Wide Web. |n System requirements: Internet connectivity; Web browser software. |
| 535 |
1 |
|a South Florida Natural Resource Center. |
| 651 |
|
|a Everglades National Park (Fla.). |
| 710 |
2 |
|a South Florida Natural Resources Center/South Florida Research Center, Everglades National Park. |
| 830 |
0 |
|a Everglades Digital Library: Reclaiming the Everglades. |
| 830 |
0 |
|a South Florida Collection. |
| 830 |
0 |
|a Federal Documents Collection. |
| 852 |
|
|a dpSobek |c Everglades Digital Library: Reclaiming the Everglades |
| 856 |
40 |
|u http://dpanther.fiu.edu/dpService/dpPurlService/purl/FI86198926/00001 |y Click here for full text |
| 992 |
04 |
|a http://dpanther.fiu.edu/sobek/content/FI/86/19/89/26/00001/FI86198926thm.jpg |
| 997 |
|
|a Everglades Digital Library: Reclaiming the Everglades |
