Evidence of an atmospheric forcing on bacterioplankton and phytoplankton dynamics in a high mountain lake

Pulido-Villena, Elvira; Reche, Isabel; Morales‐Baquero, Rafael

doi:10.1007/s00027-007-0944-8

Cited by 39 publications

(43 citation statements)

References 53 publications

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“…Because mountain lake waters are naturally dilute and have limited within catchment capacity to take up deposited nutrients, relatively small deposition rates can induce significant ecological change. For example, in the Sierra Nevada mountains of Spain dust associated P deposition ranged from 24 to 38 μ g P m −2 d −1 , a small contribution, yet this deposition rate had measurable effects on productivity, inferred from chlorophyll‐ a , bacterial abundance, and plankton diversity (Morales‐Baquero et al, ; Pulido‐Villena et al, ). Recently dust deposition has been implicated in the widespread increase in P concentrations in remote lakes and streams across the United States (Stoddard et al, ).…”

Section: Discussionmentioning

confidence: 99%

Increased Dust Deposition in New Zealand Related to Twentieth Century Australian Land Use

et al. 2019

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Mineral aerosols (dust) generated in the dryland regions of Australia have the potential to reach New Zealand through atmospheric transport. Although a large portion of dust in New Zealand originates in Australia, little is known about how dust deposition has varied over time in New Zealand or what may have caused this variation. We used geochemical dust proxies to examine the recent history of dust deposition to two alpine lakes in Kahurangi National Park, South Island, New Zealand. Geochemical indicators suggest that dust deposition began to increase around 1900, with the greatest deposition rates occurring from ~1920 to ~1990. In subsequent decades, dust deposition rates to New Zealand lakes appear to have declined. This rise and fall of dust deposition recorded in New Zealand lakes is consistent with dust records from the Antarctic Ice Sheet, Eastern Australia, and incidents of low visibility due to dust events recorded at Australian climate stations. The dust deposition rate over time also follows the temporal pattern of land use in south and central Australia over the time scale of the twentieth century suggesting a causal linkage. It is possible, and perhaps likely, that drought cycles also affected both emissions and transport pathways but over shorter time periods this was difficult to discern at the temporal resolution of these lake sediment cores. The increase in dust deposition to the high‐elevation regions of New Zealand likely has implications for the biogeochemistry of alpine lakes in the Tasman Mountains.

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Section: Discussionmentioning

confidence: 99%

Increased Dust Deposition in New Zealand Related to Twentieth Century Australian Land Use

et al. 2019

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“…Lowest rates of Nr delivery close to the ice sheet margin (Fig. ), combined with elevated P inputs (via glacially derived dust) (Pulido‐Villena et al ; Bullard and Austin ; Hawkings et al ) likely drive an imbalance in phytoplankton N : P stoichiometry (Table ), generating increased growth‐led demand for N. At the coast, where increased delivery of Nr accumulated in winter snowpack is released to lakes upon thaw, the N : P stoichiometric imbalance drives an increased demand for P (as recorded in spring under ice cover).…”

Section: Discussionmentioning

confidence: 99%

Regional variability in the atmospheric nitrogen deposition signal and its transfer to the sediment record in Greenland lakes

Anderson

Curtis

Whiteford

et al. 2018

Limnology & Oceanography

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Disruption of the nitrogen cycle is a major component of global environmental change. δ15N in lake sediments is increasingly used as a measure of reactive nitrogen input but problematically, the characteristic depleted δ15N signal is not recorded at all sites. We used a regionally replicated sampling strategy along a precipitation and N‐deposition gradient in SW Greenland to assess the factors determining the strength of δ15N signal in lake sediment cores. Analyses of snowpack N and δ15N‐NO3 and water chemistry were coupled with bulk sediment δ15N. Study sites cover a gradient of snowpack δ15N (ice sheet: −6‰; coast −10‰), atmospheric N deposition (ice sheet margin: ∼ 0.2 kg ha−1 yr−1; coast: 0.4 kg ha−1 yr−1) and limnology. Three 210Pb‐dated sediment cores from coastal lakes showed a decline in δ15N of ca. −1‰ from ∼ 1860, reflecting the strongly depleted δ15N of snowpack N, lower in‐lake total N (TN) concentration (∼ 300 μg N L−1) and a higher TN‐load. Coastal lakes have 3.7–7.1× more snowpack input of nitrate than inland sites, while for total deposition the values are 1.7–3.6× greater for lake and whole catchment deposition. At inland sites and lakes close to the ice‐sheet margin, a lower atmospheric N deposition rate and larger in‐lake TN pool resulted in greater reliance on N‐fixation and recycling (mean sediment δ15N is 0.5–2.5‰ in most inland lakes; n = 6). The primary control of the transfer of the atmospheric δ15N deposition signal to lake sediments is the magnitude of external N inputs relative to the in‐lake N‐pool.

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“…The filtrate was used for analysing soluble reactive phosphorus (SRP), nitrate (NO 3 ( -N), sulphate (SO 4 2 ( -S), silicate (SiO 2 -Si), chloride (Cl ( ), and calcium (Ca 2' ), potassium (K ' ), sodium (Na ' ) and magnesium (Mg 2' ). Data on PM, TP, TN, SRP and Ca 2' have been published elsewhere to assess their effects on alpine lake chemistry and biology Pulido-Villena et al, 2006;Pulido-Villena et al, 2008a). These values where incorporated in the data pool under the different approach of this work.…”

Section: Sampling and Chemical Analysesmentioning

confidence: 98%

Chemical signature of Saharan dust on dry and wet atmospheric deposition in the south-western Mediterranean region

Morales‐Baquero

Pulido-Villena

Reche

2013

Tellus B: Chemical and Physical Meteorology

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We studied if the presence of Saharan dust intrusions and the rains modify the chemical signature of the wet and dry deposition in the southern Iberian Peninsula. We have sorted the 109 sampling weeks by the presence (rainy weeks) or absence (dry weeks) of rain and by the occurrence or not of Saharan dust intrusions. Dry deposition dominated the delivery of particulate material (PM), total phosphorus (TP), soluble reactive phosphorus (SRP), Ca2+, Mg2+ and K+, whereas wet deposition dominated the delivery of Na+, total nitrogen, and. In the dry weeks, the presence of Saharan dust intrusions lead to higher inputs of PM, TP, SRP, Ca2+, Mg2+ and K+ in the dry deposition. Conversely, in the rainy weeks, there were no differences in mean values of dry deposition irrespective of the occurrence of Saharan dust intrusions. Nevertheless, in the presence of Saharan intrusions and some rain, the weekly collection of PM, TP and Ca2+ in dry deposition were significantly higher and increased as rainfall was lower. By contrast, the ions Cl– and Na+ in wet deposition were higher in absence of Saharan dust intrusion and increased as rainfall increased

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Evidence of an atmospheric forcing on bacterioplankton and phytoplankton dynamics in a high mountain lake

Cited by 39 publications

References 53 publications

Increased Dust Deposition in New Zealand Related to Twentieth Century Australian Land Use

Increased Dust Deposition in New Zealand Related to Twentieth Century Australian Land Use

Regional variability in the atmospheric nitrogen deposition signal and its transfer to the sediment record in Greenland lakes

Chemical signature of Saharan dust on dry and wet atmospheric deposition in the south-western Mediterranean region

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