Late Holocene paleoenvironmental changes inferred from Manasbal Lake sediments, Kashmir Valley, India

Babeesh, C.; Achyuthan, Hema; Resmi, M. R.; Nautiyal, C. M.; Shah, Rayees Ahmad

doi:10.1016/j.quaint.2019.02.017

Cited by 25 publications

(12 citation statements)

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“…Millennial to centennial scale climate changes as observed in the Wular Lake sediments have also been documented by other studies from the Himalayan region (Babeesh et al, 2019;Demske et al, 2009;Khan et al, 2018;Lone et al, 2019;Rawat et al, 2015;Srivastava et al, 2017), in south Indian lakes and deltas (Achyuthan et al, 2016;Ponton et al, 2012;Rajmanickam et al, 2016;Sarkar et al, 2015), marine sediment records (Bond et al, 1997;Cullen et al, 2000;Gupta et al, 2003;Nagasundaram et al, 2014;Orme et al, 2018;Staubwasser et al, 2003), ice core records (Grootes and Stuiver 1997;Stuiver et al, 1995;Thompson et al, 1997), and speleothem records (Cai et al, 2010;Fleitmann et al, 2003;Lone et al, 2014;Smith et al, 2016;Wang et al, 2005;Yadava et al, 2004). These palaeoclimate records provide an integrated record that includes short and extreme dry/ cool events such as at 10,300 yr BP, 8200 yr BP, 6300 yr BP, 4200 yr BP and 600-400 yr BP during the Holocene.…”

Section: A Regional Comparison Of the Palaeoclimate Recordssupporting

confidence: 78%

Holocene palaeoenvironmental records from the high-altitude Wular Lake, Western Himalayas

et al. 2020

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We present a comprehensive record of Holocene (11,590–628 cal. yr BP) climate and hydrographic changes around the Wular Lake located in Kashmir Valley, India. Based on the multi-proxy investigations, we have identified three phases of wet climate conditions that prevailed from the commencement of the Holocene Epoch – 9000 cal. yr BP, 8100–6650 cal. yr BP and 6350–5000 cal. yr BP, whereas periods of dry climate were observed during 9000–8100 cal. yr BP, 6650–6350 cal. yr BP and ~5000 to 4000 cal. yr BP. The results also suggested that the lake widened and deepened significantly around 6350–5000 cal. yr BP. The results indicated desiccation and the exposure of the lake margin around 5000–4500 cal. yr BP. The sedimentation rate since 4500–628 cal. yr BP was quite low for detailed paleoclimate interpretations. Oscillations in lake extension and deepening appear to be due to changing intensity of westerly moisture in the region, and we correlate several of the low lake-level phases to the Bond events caused by North Atlantic ice rafting events.

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Section: A Regional Comparison Of the Palaeoclimate Recordssupporting

confidence: 78%

Holocene palaeoenvironmental records from the high-altitude Wular Lake, Western Himalayas

et al. 2020

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“…( h ) A/C pollen ratio, (lake) Tso Moriri, Ladakh 57 . ( i ) Inferred environmental conditions, multiple records, Kashmir Valley 43 , 54 , 55 . …”

Section: Resultsmentioning

confidence: 99%

“…Despite localised variability among regional lake or sediment records, multiple proxies indicate an overall drier environment during this period 50 – 53 . Environmental indicators from the current study sites 43 , other Kashmir Valley records 54 , 55 (Fig. 2 i) and proximal lake records from Ladakh (Fig.…”

Section: Discussionmentioning

confidence: 96%

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Palaeoenvironmental proxies indicate long-term development of agro-pastoralist landscapes in Inner Asian mountains

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Penny

et al. 2022

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A growing body of archaeological research on agro-pastoralist populations of the Inner Asian mountains indicates that these groups adapted various systems of mobile herding and cultivation to ecotopes across the region from as early as 5000 BP. It has been argued that these adaptations allowed the development of flexible social-ecological systems well suited to the long-term management of these mountain landscapes. At present, less attention has been paid to examining the long-term ecological legacy of these adaptations within the sedimentary or palaeoenvironmental record. Here we present sediment, palynomorph and charcoal data that we interpret as indicating agro-pastoralist environmental perturbations, taken from three cores at middle and high altitudes in the Kashmir Valley at the southern end of the Inner Asian mountains. Our data indicate spatially and temporally discontinuous patterns of agro-pastoralist land use beginning close to 4000 BP. Periods of intensification of upland herding are often coincident with phases of regional social or environmental change, in particular we find the strongest signals for agro-pastoralism in the environmental record contemporary with regionally arid conditions. These patterns support previous arguments that specialised agro-pastoralist ecologies across the region are well placed to respond to past and future climate deteriorations. Our data indicating long-term co-evolution of humans and landscape in the study area also have implications for the ongoing management of environments generally perceived as “pristine” or “wilderness”.

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“…Diatom investigation is an essential proxy to study spatial and temporal environmental changes in lake basins, as this diverse and ecologically important phytoplankton groups can withstand widespread changes in environmental conditions such as pH, nutrients, organic pollution, acidity and salinity (Ramanibai and Ravichandran 2013;Shah et al 2017;Babeesh et al 2019). Owing to the sensitivity to pollution and other changes, diatom assemblages have now been widely used as a proxy for environmental monitoring assessment and they also reflect the relative eutrophic condition and organic pollution level in lake basins (Shah et al 2017).…”

Section: Introductionmentioning

confidence: 99%

Sediment distribution pattern and environmental implications of physico-chemical characteristics of the Akkulam-Veli Lake, South India

et al. 2019

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This study reports the spatial distributions of diatom assemblages and potential relationships between diatom diversity and environmental variables (C/N ratio, CaCO 3 %, clay mineralogy) using multivariate analyses in surface sediments of the Akkulam-Veli Lake. Surface sediment samples were collected at 19 sites throughout the lake to analyse diatom distribution, TOC, N, CaCO 3 %, clay mineralogy and sediment texture. The results suggest that the clay fraction is predominant in the eastern flank, whereas sand fraction is more in the western flank. TOC% and CaCO 3 % in the lake floor sediments are attributed to high organic activity within the lake and contributions from the vegetation around the lake margins. The results suggest that N is being added to the lake from secondary sources from catchment area leading to eutrophication of the lake. Further, clay mineralogy of the sediment samples reveals that kaolinite mineralogy dominates in clay fractions. Diatom studies show rich diversity of freshwater, marine and brackish diatoms and abundance of pollution-reflecting species such as Cyclotella sp. and Navicula sp.

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Late Holocene paleoenvironmental changes inferred from Manasbal Lake sediments, Kashmir Valley, India

Cited by 25 publications

References 96 publications

Holocene palaeoenvironmental records from the high-altitude Wular Lake, Western Himalayas

Holocene palaeoenvironmental records from the high-altitude Wular Lake, Western Himalayas

Palaeoenvironmental proxies indicate long-term development of agro-pastoralist landscapes in Inner Asian mountains

Sediment distribution pattern and environmental implications of physico-chemical characteristics of the Akkulam-Veli Lake, South India

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