Holocene circum-Mediterranean vegetation changes: Climate forcing and human impact

Jalut, Guy; Dedoubat, J.J.; Fontugne, Michel; Otto, Thierry

doi:10.1016/j.quaint.2008.03.012

Cited by 343 publications

(308 citation statements)

References 105 publications

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“…4) as shown by the progressive decrease in natural forest species and the increase in xerophytes such as Artemisia. This agrees with previous 15 paleoclimatic studies in the western Mediterranean, which document a progressive aridification trend since ~7000 cal yr BP (Carrión et al, 2002;Fletcher and Sánchez Goñi, 2008;Jalut et al, 2009;Carrión et al, 2010;Anderson et al, 2011;Jiménez-Moreno et al, 2012. Jiménez- Moreno et al ( , 2015 suggested that semidesert expansion and Mediterranean forest decline during the late Holocene in this area could be explained by decreasing summer insolation (Laskar et al, 2004;Fig.…”

Section: Aridification Trend During the Late Holocenesupporting

confidence: 91%

“…Although numerous studies have suggested that the Mediterranean vegetation evolution during the Holocene was largely due to human impact (Reille and Pons, 1992;Pons and Quézel, 1998), Jalut et al (2009) considered climate change to be a more important determining factor. Others have suggested that we are still far from understanding the correlation between vegetation, fire, climate and human activity, because of the importance of ecological factors in shaping the timing of vegetation responses to disturbances (Carrión et al, 2007).…”

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confidence: 99%

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Centennial-scale vegetation and North Atlantic Oscillation changes during the Late Holocene in the southern Iberia

Ramos‐Román

Jiménez‐Moreno

Anderson

et al. 2016

Quaternary Science Reviews

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Highlights1. We studied a late Holocene vegetation and fire record from southern Spain.2. A long-term aridification trend is observed, interrupted by shorter-scale variability.3. This study shows humidity changes during the last 4500 yr, related to NAO changes and solar variability. AbstractHigh-resolution pollen analysis, charcoal, non-pollen palynomorphs and magnetic susceptibility have been analyzed in the sediment record of a peat bog in Sierra Nevada in southern Iberia. The study of these proxies provided the reconstruction of vegetation, 2 climate, fire and human activity of the last ~4500 cal yr BP. A progressive trend towards aridification during the late Holocene is observed in this record. This trend is interrupted by millennial-and centennial-scale variability of relatively more humid and arid periods. Arid conditions are recorded between ~4000 to 3100 cal yr BP, being characterized by a decline in arboreal pollen and with a spike in magnetic susceptibility. This is followed by a relatively humid period from ~3100 to 1600 cal yr BP, coinciding partially with the Iberian-Roman Humid Period, and is indicated by the increase of

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Section: Aridification Trend During the Late Holocenesupporting

confidence: 91%

mentioning

confidence: 99%

Centennial-scale vegetation and North Atlantic Oscillation changes during the Late Holocene in the southern Iberia

Ramos‐Román

Jiménez‐Moreno

Anderson

et al. 2016

Quaternary Science Reviews

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“…10). Furthermore, dry conditions have been widely described in the western Mediterranean region based on marine and terrestrial pollen records (Jalut et al, 2000(Jalut et al, , 2009CombourieuNebout et al, 2009). Reduced river activity in Southern Europe (Magny et al, 2002;Macklin et al, 2006), cooling events with lower temperatures and faster flows in the Balearic Basin (Frigola et al, 2007), and a desiccation phase in a lacustrine record from Southern Spain (Carrión, 2002) are likewise reported for this time frame.…”

Section: Grain Size Distribution Oxygen Conditions Paleoproductivitmentioning

confidence: 99%

“…McDermott et al, 2001;Mangini et al, 2007), fossil pollen (e.g. Willard et al, 2005;Jalut et al, 2009) and tree rings (e.g. Esper et al, 2002;Moberg et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

Tracking climate variability in the western Mediterranean during the Late Holocene: a multiproxy approach

et al. 2011

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Abstract. Climate variability in the western Mediterranean is reconstructed for the last 4000 yr using marine sediments recovered in the west Algerian-Balearic Basin, near the Alboran Basin. Fluctuations in chemical and mineralogical sediment composition as well as grain size distribution are linked to fluvial-eolian oscillations, changes in redox conditions and paleocurrent intensity. Multivariate analyses allowed us to characterize three main groups of geochemical and mineralogical proxies determining the sedimentary record of this region. These three statistical groups were applied to reconstruct paleoclimate conditions at high resolution during the Late Holocene. An increase in riverine input (fluvial-derived elements -Rb/Al, Ba/Al, REE/Al, Si/Al, Ti/Al, Mg/Al and K/Al ratios), and a decrease in Saharan eolian input (Zr/Al ratio) depict the Roman Humid Period and the Little Ice Age, while drier environmental conditions are recognized during the Late Bronze Age-Iron Age, the Dark Ages and the Medieval Climate Anomaly. Additionally, faster bottom currents and more energetic hydrodynamic conditions for the former periods are evidenced by enhanced sortable silt (10-63 µm) and quartz content, and by better oxygenated bottom waters -as reflected by decreasing redox-sensitive elements (V/Al, Cr/Al, Ni/Al and Zn/Al ratios). In contrast, opposite paleoceanographic conditions are distinguished during the latter periods, i.e. the Late Bronze Age-Iron Age, the Dark Ages and the Medieval Climate Anomaly. Although no Ba excess was registered, other paleoproductivity indicators Correspondence to: V. Nieto-Moreno (vanesanieto@ugr.es) (total organic carbon content, Br/Al ratio, and organometallic ligands such as U and Cu) display the highest values during the Roman Humid Period, and together with increasing preservation of organic matter, this period exhibits by far the most intense productivity of the last 4000 yr. Fluctuations in detrital input into the basin as the main process managing deposition, reflected by the first eigenvector defined by the Principal Component Analyses, point to solar irradiance and the North Atlantic Oscillation variability as the main driving mechanisms behind natural climate variability over decadal to centennial time-scales for the last 4000 yr.

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“…The semi-arid cold Mediterranean climate prevails over the study area, which makes the dominance of steppe vegetation adapted to xeric conditions in Central Anatolia. Besides, the development of the cultural landscapes led the formation of new plant communities over years and the most of these communities are the anthropogenic ones (Jalut et al, 2009). These communities which characterize the vegetation of the region are in equilibrium with the climatic conditions.…”

Section: Life Forms and Chorotypesmentioning

confidence: 99%

Phytosociological investigations of steppe and steppe forest vegetation in the south-east part of Central Anatolia of Turkey

Kenar¹

2017

İstanbul Üniversitesi Orman Fakültesi Dergisi

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Abstract:To gain a better understanding of the ecological systems, it is necessary to study the development, composition, and classification of the steppe and steppe forest communities, which are the primary components of phytocoenoses in semi-arid environments. Therefore, this study was aimed to contribute to a syntaxonomic classification of the Central Anatolian steppe and steppe forest vegetation. The Braun-Blanquet approach was used to analyze the vegetation of the study area in Göllüdağ (2172 m a.s.l.) located in the north of Niğde province. The vegetation data were analyzed using cluster analysis and detrended components analysis. The relationships between the communities and certain environmental factors were examined by principal components analysis. Two new steppe and steppe forest communities in Central Anatolia were classified in this study. The steppe communities were included in Agropyro tauri-Stachydion lavandulifoliae and Astragalo-Brometalia, whereas the steppe forest communities were classified as Quercion anatolicae and Querco cerridis-Carpinetalia orientalis.Key words: Göllüdağ, steppe, oak scrubs, phytosociology, syntaxonomy İç Anadolu'nun Güneydoğu kesiminde step ve step bitki örtüsü ile ilgili fitososyolojik araştırmalar Özet: Ekolojik sistemlerin daha iyi anlaşılması için yarı kurak ortamlardaki fitosenözlerin temel bileşenlerinden olan step ve step ormanı komünitelerinin gelişimi, yapısı ve sınıflandırılmasının araştırılması gerekmektedir. Bu nedenle çalışmada, İç Anadolu step ve step ormanı vejetasyonunun sintaksonomik olarak sınıflandırılmasına katkı sağlaması amaçlanmıştır. Niğde ilinin kuzeyinde bulunan Göllüdağ'da bulunan araştırma alanının vejetasyonu Braun-Blaunquet metoduna göre analiz edilmiştir. Vejetasyon verilerinin analizi, kümeleme ve Eğilimsiz Uyum Analizi ile gerçekleştirilmiştir. Komüniteler ile bazı çevresel faktörler arasındaki ilişki Temel Bileşen Analizi yardımıyla incelenmiştir. Çalışmada İç Anadolu'da iki yeni step ve step ormanı komünitesi tespit edilmiştir.Step komünitesi Agropyro tauri-Stachydion lavandulifoliae alyansına ve Astragalo-Brometalia ordosuna dâhil edilirken, step ormanı komünitesi Quercion anatolicae alyansına ve Querco cerridis-Carpinetalia orientalis ordosu içerisinde sınıflandırılmıştır.

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Holocene circum-Mediterranean vegetation changes: Climate forcing and human impact

Cited by 343 publications

References 105 publications

Centennial-scale vegetation and North Atlantic Oscillation changes during the Late Holocene in the southern Iberia

Centennial-scale vegetation and North Atlantic Oscillation changes during the Late Holocene in the southern Iberia

Tracking climate variability in the western Mediterranean during the Late Holocene: a multiproxy approach

Phytosociological investigations of steppe and steppe forest vegetation in the south-east part of Central Anatolia of Turkey

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