The role of recharge and evapotranspiration as hydraulic drivers of ion concentrations in shallow groundwater on Everglades tree islands, Florida (USA)

2012 ◽  
Vol 28 (2) ◽  
pp. 293-304 ◽  
Author(s):  
Pamela L. Sullivan ◽  
René M. Price ◽  
Fernando Miralles-Wilhelm ◽  
Mike S. Ross ◽  
Leonard J. Scinto ◽  
...  
Keyword(s):  
Shallow Groundwater ◽  
Tree Islands ◽  
Ion Concentrations ◽  
Everglades Tree Islands

scholarly journals Diversity and Structure of Soil Fungal Communities across Experimental Everglades Tree Islands

Diversity ◽  
2020 ◽  
Vol 12 (9) ◽  
pp. 324
Author(s):  
Brianna K. Almeida ◽  
Michael S. Ross ◽  
Susana L. Stoffella ◽  
Jay P. Sah ◽  
Eric Cline ◽  
...  
Keyword(s):  
Water Level ◽  
Fungal Community ◽  
Plant Pathogen ◽  
Fungal Diversity ◽  
Fungal Communities ◽  
Tree Islands ◽  
Fungal Community Composition ◽  
Everglades Tree Islands ◽  
And Function ◽  
Early Restoration

Fungi play prominent roles in ecosystem services (e.g., nutrient cycling, decomposition) and thus have increasingly garnered attention in restoration ecology. However, it is unclear how most management decisions impact fungal communities, making it difficult to protect fungal diversity and utilize fungi to improve restoration success. To understand the effects of restoration decisions and environmental variation on fungal communities, we sequenced soil fungal microbiomes from 96 sites across eight experimental Everglades tree islands approximately 15 years after restoration occurred. We found that early restoration decisions can have enduring consequences for fungal communities. Factors experimentally manipulated in 2003–2007 (e.g., type of island core) had significant legacy effects on fungal community composition. Our results also emphasized the role of water regime in fungal diversity, composition, and function. As the relative water level decreased, so did fungal diversity, with an approximately 25% decline in the driest sites. Further, as the water level decreased, the abundance of the plant pathogen–saprotroph guild increased, suggesting that low water may increase plant-pathogen interactions. Our results indicate that early restoration decisions can have long-term consequences for fungal community composition and function and suggest that a drier future in the Everglades could reduce fungal diversity on imperiled tree islands.

scholarly journals Community Structure and Functional Role of Limber Pine (Pinus flexilis) in Treeline Communities in Rocky Mountain National Park

Forests ◽  
2020 ◽  
Vol 11 (8) ◽  
pp. 838
Author(s):  
Laurel A. Sindewald ◽  
Diana F. Tomback ◽  
Eric R. Neumeyer
Keyword(s):  
National Park ◽  
Functional Role ◽  
Rocky Mountain ◽  
Rocky Mountain National Park ◽  
Tree Islands ◽  
Pinus Flexilis ◽  
Tree Island ◽  
Limber Pine ◽  
Study Sites

Research Highlights: Limber pine (Pinus flexilis) is abundant in some alpine treeline ecotone (ATE) communities east of the Continental Divide in Rocky Mountain National Park (RMNP) and the Colorado Front Range. Limber pine may be able to colonize the ATE under changing climate aided by directed seed dispersal by Clark’s nutcrackers (Nucifraga columbiana). Cronartium ribicola, white pine blister rust, is a growing threat to limber pine and may affect its functional role within the ATE. Background and Objectives: The ATE is sensitive, worldwide, to increasing temperature. However, the predicted advance of treeline under a changing climate may be modified by tree species composition and interactions. We aimed to (1) examine the conifer species composition and relative abundances in treeline communities with limber pine; (2) assess which functional roles limber pine assumes in these communities—tree island initiator, tree island component, and/or solitary tree; and (3) determine whether limber pine’s occurrence as a tree island initiator can be predicted by its relative abundance as a solitary tree. Materials and Methods: We selected four study sites in RMNP above subalpine forest limber pine stands. We sampled the nearest tree island to each of forty random points in each study site as well as solitary tree plots. Results: Across study sites, limber pine comprised, on average, 76% of solitary trees and was significantly more abundant as a solitary tree than Engelmann spruce (Picea engelmannii) or subalpine fir (Abies lasiocarpa). Limber pine was a frequent component of multi-tree islands in three study sites, the major component in one study site, and dominated single-tree islands at two study sites. At three of four study sites, no species had significantly greater odds of being a tree island initiator. Limber pine was found less often as a tree island initiator than predicted from its relative abundance as a solitary tree, given the likely role of solitary trees in tree island formation.

Radiometric evidence for involvement of floating islands in the formation of Florida Everglades tree islands

Geology ◽  
1980 ◽  
Vol 8 (4) ◽  
pp. 195 ◽  
Author(s):  
Patrick J. Gleason ◽  
Donald Piepgras ◽  
Peter A. Stone ◽  
Jerry Stipp
Keyword(s):  
Florida Everglades ◽  
Tree Islands ◽  
Everglades Tree Islands

scholarly journals THE INACTIVATION OF COMPLEMENT AND ITS COMPONENTS BY PLASMIN

1953 ◽  
Vol 97 (4) ◽  
pp. 573-589 ◽  
Author(s):  
Louis Pillemer ◽  
Oscar D. Ratnoff ◽  
Livia Blum ◽  
I. H. Lepow
Keyword(s):  
Human Serum ◽  
Proteolytic Enzyme ◽  
Complement Fixation ◽  
Hydrogen Ion ◽  
Complement Components ◽  
High Hydrogen ◽  
Ion Concentrations ◽  
Plasmin Inhibitors ◽  
Antigen Antibody

Human complement is inactivated by plasmin, the proteolytic enzyme of plasma or serum active at or near neutrality. The addition of streptokinase to human serum, which converts plasminogen to plasmin, also causes the inactivation of complement components C'2 and C'4 and varying amounts of C'1. C'3 is the most resistant to inactivation by plasmin. Chloroform-activated human plasmin and bovine plasmin also destroy these components of complement, but are less effective than the streptokinase-activated enzyme. The inactivation of complement by the addition of streptokinase to human serum is inhibited by high hydrogen ion concentrations, low temperature, and elevated ionic strength. The inactivation of the components of complement in various fractions of serum is influenced by the available plasminogen and the content of plasmin inhibitors in these fractions. Certain similarities are pointed out between the components of complement and the factors in the plasmin system and between the inactivation of the components of complement by antigen-antibody reactions, by specific agents, and by plasmin. The possible significance of these relationships in immune hemolysis and complement fixation, and the possible role of the plasmin system in the instability of complement and the development of anticomplementary properties in serum are discussed.

The role of airborne dust in the growth of tree islands in the Okavango Delta, Botswana

Geomorphology ◽  
2014 ◽  
Vol 206 ◽  
pp. 307-317 ◽  
Author(s):  
M.S. Humphries ◽  
T.S. McCarthy ◽  
G.R.J. Cooper ◽  
R.A. Stewart ◽  
R.D. Stewart
Keyword(s):  
Okavango Delta ◽  
Tree Islands ◽  
Airborne Dust

scholarly journals Preliminary use of uric acid as a biomarker for wading birds on Everglades Tree Islands, Florida, United States

2010 ◽  
Author(s):  
Anne L. Bates ◽  
William H. Orem ◽  
Susan Newman ◽  
Dale E. Gawlik ◽  
Harry E. Lerch ◽  
...  
Keyword(s):  
United States ◽  
Uric Acid ◽  
Tree Islands ◽  
Wading Birds ◽  
Everglades Tree Islands
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