Testate Amoebae (Protozoa) as Indicators of Drainage in a Forested Mire, Northern Ontario, Canada

Warner, Barry G.; Chmielewski, Jerry G.

doi:10.1016/s0003-9365(11)80067-9

Cited by 27 publications

(14 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…pollen and spores), and (5) they may not respond to exactly the same factors as other indicators such as vascular plants (Mitchell et al 2000b) and thus provide an independent line of evidence for multi-proxy paleoecological reconstructions (Schreve and Thomas 2001). The growing number of paleoecological studies that have used testate amoebae now attest to the value of the transfer function approach to palaeoenvironmental reconstruction (Beyens and Chardez 1987;Charman 2001;Charman et al 2001;Charman et al 1999;Charman et al 1998;Mitchell et al 1999;Warner and Charman 1994;Warner and Chmielewski 1992;Woodland et al 1998). Testate amoebae are also central to an EU-funded research project (ACCROTELM), which aims to provide data on mid-late Holocene climate changes by analysing testate amoebae in peat sediments.…”

Section: Community Structure and Responses To Ecological Gradientsmentioning

confidence: 99%

Testate amoebae analysis in ecological and paleoecological studies of wetlands: past, present and future

2007

Self Cite

View full text Add to dashboard Cite

Testate amoebae are an abundant and diverse polyphyletic group of shelled protozoa living in aquatic to moist habitats ranging from estuaries to lakes, rivers, wetlands, soils, litter, and moss habitats. Owing to the preservation of shells in sediments, testate amoebae are useful proxy indicators complementary to long-established indicators such as pollen and spores or macrofossils. Their primary use to date has been for inferring past moisture conditions and climate in ombrotrophic peatlands and, to a lesser extent, to infer pH in peatlands and the trophic or nutrient status of lakes. Recent research on these organisms suggests other possible uses in paleoecology and ecology such as sea-level reconstruction in estuarine environments, as indicators of soil or air pollution, and monitoring recovery of peatland. We review the past and present use of testate amoebae, the challenges in current research, and provide some ideas on future research directions.

show abstract

Section: Community Structure and Responses To Ecological Gradientsmentioning

confidence: 99%

Testate amoebae analysis in ecological and paleoecological studies of wetlands: past, present and future

2007

Self Cite

View full text Add to dashboard Cite

show abstract

“…About 30-40 taxa are typical in Canadian Sphagnum peatlands (Warner, 1987;Charman and Warner, 1992;Warner and Chmielewski, 1992 A tl a n ti c S u b a rc ti c to A tl a n ti c B o r e a l to A tl a n ti c O c e a n ic (W e ll s 1 9 8 1 )…”

Section: Protozoamentioning

confidence: 99%

Biological diversity of peatlands in Canada

Warner

Asada

2006

Aquat. Sci.

Self Cite

View full text Add to dashboard Cite

show abstract

“…Testate amoebae represented as much as one‐half of the microbial biomass in this peatland before nutrient addition. Testate amoebae have also been used as bioindicators of the environmental impact of draining peatlands (Warner & Chmielewski, 1992) and for palaeoenvironmental reconstructions because their shells remain well preserved in peat (Buttler et al. , 1996).…”

Section: Introductionmentioning

confidence: 99%

Influence of solar UV‐B radiation on peatland microbial communities of southern Argentinia

et al. 2001

View full text Add to dashboard Cite

Summary• Stratospheric ozone depletion occurs over Tierra del Fuego, Argentina, in the austral spring and summer due to the Antarctic 'ozone hole' and the general erosion of the ozone layer. Thus, we investigated the responses of microbial communities to manipulations of solar UV-B radiation.• Results reported here are for field plots receiving either near-ambient or reduced solar UV-B using plastic filters in a Sphagnum peatland and a Carex fen during the second and third years of UV-B manipulations.• The total number of testate amoebae (Protozoa, Rhizopoda) inhabiting the upper centimeter of Sphagnum magellanicum was greater under near-ambient solar UV-B than under reduced UV-B. No response to UV-B manipulation was apparent for rotifers, nematodes, bacteria, microfungi, and a common microalga ( Euglena mutabilis ) inhabiting the S. magellanicum. On leaves of small Nothofagus antarctica trees, the ratio of upper: lower leaf-surface fungal populations for the genus Aureobasidium and for total fungi indicated lower populations on the upper, relative to the lower, surface under near-ambient solar UV-B.• When responses to modifications of the solar UV-B flux were detected, these involved both direct UV-B inhibition and indirect consequences of UV-B manipulation.

show abstract

Testate Amoebae (Protozoa) as Indicators of Drainage in a Forested Mire, Northern Ontario, Canada

Cited by 27 publications

References 3 publications

Testate amoebae analysis in ecological and paleoecological studies of wetlands: past, present and future

Testate amoebae analysis in ecological and paleoecological studies of wetlands: past, present and future

Biological diversity of peatlands in Canada

Influence of solar UV‐B radiation on peatland microbial communities of southern Argentinia

Contact Info

Product

Resources

About