Climate and human impact on lowland lake sedimentation in Central Coastal California: the record from c. 650 ad to the present

Plater, Andrew J.; Boyle, John; Mayers, C.; Turner, Simon; Stroud, R. W.

doi:10.1007/s10113-006-0013-1

Cited by 26 publications

(9 citation statements)

References 28 publications

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“…Stresses on lake ecosystems include climate change, nutrient enrichment from domestic and agricultural sources, reduced water quality from over-extraction of fresh water, pollution with toxic metals and organic compounds derived from the surrounding catchment or from the atmosphere, and accelerated infill as a result of enhanced soil erosion and changes in biological productivity (Plater et al, 2006). Since the environment affects different proxies differently, the deficiencies in one proxy may be compensated for by another.…”

Section: Introductionmentioning

confidence: 99%

Human impact on low-land Vellayani Lake, south India: A record since 3000 yrs BP

et al. 2014

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Section: Introductionmentioning

confidence: 99%

Human impact on low-land Vellayani Lake, south India: A record since 3000 yrs BP

et al. 2014

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“…Sequential combustion and mass loss of dried sediment samples at 550°C (organic matter) and 950°C (carbonate) quickly determine the organicinorganic fractions of the sediment matrix. For its simplicity, LOI profiles can indicate significant change in lake levels, sediment composition, littoral vegetation expansion and human disturbance (Shuman, 2003;Plater et al, 2006). However, because of the bulk measurement process, LOI values of organic carbon should be compared with total elemental carbon values (Dean, 1974).…”

Section: Introductionmentioning

confidence: 99%

Sedimentary evidence for recent increases in production in Tibetan plateau lakes

et al. 2010

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The Tibetan Plateau is a vast, elevated plateau in Central Asia with an average elevation of over 4,500 m and contains the world's third largest store of ice. It occupies a climatic transition zone between the Asian monsoons and westerly airflow. As a result of this location, the region is sensitive to changes in climate on timescales of decades to millennia and longer. Long-term data are needed to evaluate climatic changes and their impact on ecosystems, but in areas as remote as the Tibetan Plateau, long-term instrumental records of environmental change are geographically sparse and monitoring has only been undertaken in recent times. Paleolimnological approach might be then one of the few means by which environmental variability can be ascertained at scales that allow comparison with contemporary monitoring data and future model projections. Therefore, a paleolimnological study was undertaken in eight different lakes sampled along a North-South transect across the Tibetan Plateau analysing geochemistry and algal pigment in order to assess longer term variability in the trophic condition of these systems and their potential to reconstruct changes in relation to recent climate evolution and possible human impacts. Chronologies for the last century were based on radiometric techniques ( 210 Pb, 241 Am and 137 Cs). Results show that inorganic sediment dominates the composition of the cores used in this study. Organic carbon constitutes less than 5% d.w. in all the lake cores, except for Kemen Co core where concentrations up to 14% d.w., are observed. Corg:N ratios are generally in the order of 5-10, indicating that autochthonous algal production is the principal biological source of organic matter. Pigment preservation is generally good throughout the cores from all lakes as shown by the 430:410 nm ratio that is generally around 1.0 or higher. Six out of eight lakes show an increase in primary production in recent times. High pre-1800 AD pigment concentrations were detected only in Qinghai Lake. Since most of the lakes show a similar behaviour in the most recent section of the core, we interpret this as a response to climate and land-use changes that have increased autochthonous production throughout the Tibetan Plateau.

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“…The classic study of Davis (1976) at Frains Lake, Michigan is paralleled by others from as far afield as coastal California, where Plater et al (2006) detect an order of magnitude increase in sediment accumulation rates on the arrival of the first European immigrants. Where it has been possible to discriminate between sediment derived from topsoil and that derived from deeper in the regolith, accelerated loss of topsoil is seen to coincide with the first evidence for deforestation and tillage by European settlers (cf.…”

Section: Impacts On Hydrologic and Erosion Regimesmentioning

confidence: 94%

The Role of People in the Holocene

Oldfield

2008

Natural Climate Variability and Global Warming

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Climate and human impact on lowland lake sedimentation in Central Coastal California: the record from c. 650 ad to the present

Cited by 26 publications

References 28 publications

Human impact on low-land Vellayani Lake, south India: A record since 3000 yrs BP

Human impact on low-land Vellayani Lake, south India: A record since 3000 yrs BP

Sedimentary evidence for recent increases in production in Tibetan plateau lakes

The Role of People in the Holocene

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