Diatom (Bacillariophyta) community response to phosphorus in the Everglades National Park, USA

Raschke, R. L.

doi:10.2216/i0031-8884-32-1-48.1

Cited by 38 publications

(20 citation statements)

References 6 publications

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“…While the past is replete with conditional studies in lentic and lotic systems (McCormick and Cairns, 1997), only relatively recently have researchers begun using diatoms in the assessment of wetland conditions (U.S. EPA, 2002). Diatom studies in wetlands have thus far shown strong correlations between changes in physical and chemical parameters with diatom composition in the Florida Everglades (Raschke, 1993), prairie potholes (Adamus, 1996), riverine bottomland forests and marshes (Pan and Stevenson, 1996), isolated marshes in peninsular Florida (Lane, 2003), and Florida depressional forested wetlands (Reiss, 2004).…”

Section: Introductionmentioning

confidence: 99%

Assessment of Isolated Wetland Condition in Florida Using Epiphytic Diatoms at Genus, Species, and Subspecies Taxonomic Resolution

Lane

2007

EcoHealth

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Diatoms are useful indicators of aquatic conditions, and metrics based on published autecological indicator values have been developed utilizing their sensitivities to various ambient physical and chemical conditions. The autecological values often differ within genera, and indeed within species taxonomic levels, requiring identification to subspecies taxonomic level for accurate application. This study was conducted to determine if autecological metrics, and ultimately indices of biotic integrity, could be developed using mean autecological values at the genus, species, and subspecies taxonomic levels, and to investigate the potential benefits of increased taxonomic resolution. Sixty-nine isolated herbaceous wetlands in various land use modalities in peninsular Florida were sampled a single time for epiphytic diatoms, and soil/water physicochemical parameters. Thirty genera, 148 species, and 26 subspecies were identified. The proportional matrices at each taxonomic level were highly similar (Mantel's r > 0.75, P < 0.0001). Autecological metrics and two sensitive or tolerant measures were developed at each taxonomic level. Wetland condition, as determined by summed metric values, was strongly correlated across taxonomic level (r 2 > 0.83, P < 0.0001), and no significant difference was found when sites were placed into bins of excellent, good, fair, or poor, based on quartile scoring, for each taxonomic level. Specific conductance, soil pH, soil and water total phosphorous, and water color were significantly related to site nonmetric multidimensional scaling (NMDS) ordination scores at each taxonomic level. This study concludes that indices of biotic integrity, when developed using autecological indices, provide similar qualitative conditional information across taxonomic levels for isolated herbaceous wetlands.

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Section: Introductionmentioning

confidence: 99%

Assessment of Isolated Wetland Condition in Florida Using Epiphytic Diatoms at Genus, Species, and Subspecies Taxonomic Resolution

Lane

2007

EcoHealth

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“…Assessment of environmental conditions can be based on single species (Raschke 1993), a group of indicator species (Schoeman 1976;Ndiritu et al 2003) or whole assemblages (Stevenson 1984;Ju¨ttner et al 1996). Using whole assemblages, several indices were derived to infer environmental conditions of habitats based on the autecology of diatoms (Stevenson and Pan 1999).…”

Section: Introductionmentioning

confidence: 99%

Distribution of Epilithic Diatoms in Response to Environmental Conditions in an Urban Tropical Stream, Central Kenya

2006

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Use of diatoms in monitoring water quality is well acknowledged in developed countries, but only recently has the assessment started gaining importance in developing countries. Diatoms can be obtained from natural and artificial substrates. Appreciating the differences and similarities of diatom assemblages on both substrates may contribute to a better understanding and standardization particularly during monitoring of water quality. During this study we assessed diatom assemblages, biodiversity and trophic indices in relation to water quality along the Nairobi River. Fifteen sites were sampled in September 2000 during the dry season. Diatoms were collected from natural substrates (stones, pebbles) and artificial substrates (100% acrylic wool). On artificial and natural substrates, a total of 190 and 151 taxa were found, respectively, the majority of these taxa (80%) have cosmopolitan distribution and are also widespread throughout tropical African. Species composition changed downstream, five taxa dominated upper and mid stream sites whereas lower stream sites were dominated by one or two taxa. Species richness, diversity, dominance and evenness were positively correlated with NO 3 , O 2 and altitude but decreased markedly downstream with a simultaneous increase in total dissolved solids, alkalinity, chemical oxygen demand and PO 4 . Ordination and classification (CANOCO and TWINSPAN) showed that diatom assemblages in the Nairobi River responded strongly to water quality changes with respect to concentrations of NO 3 , NO 2 , total dissolved solids and temperature. Taxa common at less impacted upstream sites included Gomphonema gracilis, Anomoeoneis brachysira and Fragilaria biceps; while common taxa at midstream sites with agricultural catchments were Gomphonema parvulum, Navicula cryptocephala, N. schroeteri, N. bryophila, N. halophila, Nitzschia linearis var. linearis and Cymbella silesica. Achnanthes minutissima var. saprophila, Gomphonema angustum, Navicula subminuscula, N. arvensis, Nitzschia palea and N. umbonata were most common at urban sites, which were polluted by residential and industrial effluents. Trophic diatom indices suggested that water quality was poor at most sites in the Nairobi River. Most sites along the river had low Generic Diatom Index values, GDI (<12) and high Trophic Diatom Index values, TDI 73-78 (median = 76) and 75-84 (median = 77) for artificial and natural substrates, respectively. This study showed that diatoms' response on natural and artificial substrates were similar and reflected environmental conditions correctly.

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“…Diatom diversity in native Everglades calcareous periphyton communities is low 21 compared to other wetland ecosystems (average 22 taxa per sample) and has been shown to 22 increase in response to enrichment (Raschke 1993). Significant reductions in diversity (Shannon-23 1 2A, although the site closest to the canal and most severely enriched in WCA-2A had very low 2 diversity (only 7 taxa; Fig.…”

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confidence: 99%

Landscape Patterns of Periphyton in the Florida Everglades

Gaiser

McCormick

Hagerthey

et al. 2011

Critical Reviews in Environmental Science and Technology

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11Periphyton is an abundant and ubiquitous feature of the Florida Everglades, often forming thick 12 mats that blanket shallow sediments and submersed plants. They are considered to be primary 13 ecosystem engineers in the Everglades by forming and stabilizing soils, controlling 14 concentrations of nutrients and gases, and supplying food and structure for other organisms. 15Distribution patterns are related to underlying physicochemical gradients as well as those 16 hydrologic changes imposed by water management. Because communities respond rapidly to 17 environmental change, their use has been advocated to provide indication of system degradation 18 or restoration.

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Diatom (Bacillariophyta) community response to phosphorus in the Everglades National Park, USA

Cited by 38 publications

References 6 publications

Assessment of Isolated Wetland Condition in Florida Using Epiphytic Diatoms at Genus, Species, and Subspecies Taxonomic Resolution

Assessment of Isolated Wetland Condition in Florida Using Epiphytic Diatoms at Genus, Species, and Subspecies Taxonomic Resolution

Distribution of Epilithic Diatoms in Response to Environmental Conditions in an Urban Tropical Stream, Central Kenya

Landscape Patterns of Periphyton in the Florida Everglades

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