Influence of landscape complexity and land management on woody plant diversity in northern Spain

Rescia, Alejandro J.; Schmitz, María F.; Agar, Pilar Martı́n de; Pablo, Carlos Tomás López de; Atauri, José A.; Pineda, Francisco Díaz

doi:10.2307/3235977

Cited by 60 publications

(42 citation statements)

References 52 publications

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“…Sanguin et al (2009) showed that Verrucomicrobia was one of the prevalent phyla during the outbreak of wheat take-all disease, which was different from the finding in the present study that the abundance of this phylum was higher in healthy (5.06 % in rhizosphere soil and 0.40 % in roots) than diseased plants (2.85 % in rhizosphere soil and 0.32 % in roots). This may be explained by the low relative abundance of Verrucomicrobia accounted for the total sequences, 3.96 % in rhizosphere soil and 0.36 % in roots on average, variation in the initiator of different soil-borne diseases (Van Elsas et al 2002) and difference in land management (Rescia et al 1994). In this study, high abundance of Pseudomonas, which was also isolated from rotted root of P. notoginseng and exhibited the strongest pathogenicity (Miao et al 2006), was identified both in rhizosphere soils and roots, and was more abundant in diseased than that in healthy plants (Table S1).…”

Section: Discussionmentioning

confidence: 99%

Molecular characterization of microbial communities in the rhizosphere soils and roots of diseased and healthy Panax notoginseng

Hao

Zeng

et al. 2015

Antonie van Leeuwenhoek

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Rhizosphere and root-associated microbial communities are known to be related to soil-borne disease and plant health. In the present study, the microbial communities in rhizosphere soils and roots of both healthy and diseased Panax notoginseng were analyzed by high-throughput sequencing of 16S rRNA for bacteria and 18S rRNA internal transcribed spacer for fungi, to reveal the relationship of microbial community structure with plant health status. In total, 5593 bacterial operational taxonomic units (OTUs) and 963 fungal OTUs were identified in rhizosphere soils, while 1794 bacterial and 314 fungal OTUs were identified from root samples respectively. Principal coordinate analysis separated the microbial communities both in the rhizosphere soils and roots of diseased P. notoginseng from healthy plants. Compared to those of healthy P. notoginseng, microbial communities in rhizosphere soils and roots of diseased plants showed a decrease in alpha diversity. By contrast, bacterial community dissimilarity increased and fungal community dissimilarity decreased in rhizosphere soils of diseased plants, while both bacterial and fungal community dissimilarity in roots showed no significant difference between healthy and diseased plants. Redundancy analysis at the phylum level showed that mycorrhizal colonization and soil texture significantly affected microbial community composition in rhizosphere soils, whereas shoot nutrition status had a significant effect on microbial community composition in root samples. Our study provided strong evidence for the hypothesis that microbial diversity could potentially serve as an indicator for disease outbreak of medicinal plants, and supported the ecological significance of microbial communities in maintaining plant healthy and soil fertility.

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Section: Discussionmentioning

confidence: 99%

Molecular characterization of microbial communities in the rhizosphere soils and roots of diseased and healthy Panax notoginseng

Hao

Zeng

et al. 2015

Antonie van Leeuwenhoek

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“…Another contributing factor to higher diversity at lower belts may be the higher surface area of the mentioned belts (Wang et al 2007). The complexity behind the diversity patterns, especially in temperate systems including Hyrcanian forest and European deciduous forests has been pointed out by several authors (see Rescia et al 1994).…”

Section: Discussionmentioning

confidence: 99%

Woody species diversity and forest structure from lowland to montane forest in Hyrcanian forest ecoregion

Zarré

Alavipanah

2013

J. Mt. Sci.

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Alborz Mountains host Caspian Hyrcanian forest ecoregion along the northern slopes and forest steppe ecoregion in highlands. Hyrcanian forest covers the southeastern part of Caucasus biodiversity hotspot and is of great biogeographic importance. Altitudinal pattern and correlation between woody species biodiversity (DIV), forest structure ((stem density (DEN), mean basal area (MBA) and mean height class (MHC)) and disturbance (DIS) were explored along 2,400 m altitudinal gradient in Hyrcanian relict forest, Central Alborz Mountains. Vegetation changes from lowland forest (LoF) to midaltitude forest (MiF) and montane forest (MoF) in this area. The altitudinal gradient was divided into twelve 200 m elevational belts. Point centered quarter method (PCQM) with 96 sampling points and 83 vegetation samples by plot method (PM) were used to record field data. Shannon-Wiener index and Pearson coefficient were used for diversity and correlation analysis. The results showed that DEN decreased linearly, MBA and MHC showed relatively hump shaped and DIS showed a reverse hump shaped pattern of change along altitudinal gradient. Woody species diversity decreased non-steadily from LoF to MoF. Transitional vegetations of Carpinus-Fagus and Fagus-Quercus represented higher diversity of woody taxa compared to adjacent homogenous communities. Significant correlation was observed between altitude and all parameters: DEN with MBA, DIS and DIV; MBA with DIS; MHC with DIS along with DIV; and DIS with DIV at the study area scale. Surprisingly, correlation between studied parameters differed within each vegetation type. Altitude probably acts as a proxy for human and environmental driving forces in this area. Stability of warm and wet condition, season length, soil depth along with forest accessibility probably influences the altitudinal pattern of the studied parameters. Disturbance affects forest structure and consequently diversity; especially in lowlands. The obtained results recommend using both forest biodiversity and mensuration data in management process of forest ecosystems.

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“…In fact, topography interacts with local wind direction, microclimates and, in turn, vegetation type, fuel loads and moisture content. Several studies have shown topographic influences on vegetation composition and structure (Fontaine et al, 2007;Rescia et al, 1994), transpiration and desiccation conditions (Rana et al, 2005;Van der Trol et al, 2007), vegetation dynamics (Carmel andFlather, 2004;Mouillot et al, 2005), fire severity (Broncano and Retana 2004), and post-fire vegetation regeneration (Peñuelas et al, 2007;Baeza et al, 2007). Furthermore, some of the observed topographic effects on fire occurrence can be explained by human activities (e.g.…”

Section: Fire Hazard Is Higher In Specific Topographic Locationsmentioning

confidence: 99%

Landscape – wildfire interactions in southern Europe: Implications for landscape management

Moreira¹,

Viedma²,

Arianoutsou³

et al. 2011

Journal of Environmental Management

743

567

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Every year approx. half a million hectares of land are burned by wildfires in southern Europe, causing large ecological and socio-economic impacts. Climate and land use changes in the last decades have increased fire risk and danger. In this paper we review the available scientific knowledge on the relationships between landscape and wildfires in the Mediterranean region, with a focus on its application for defining landscape management guidelines and policies that could be adopted in order to promote landscapes with lower fire hazard. The main findings are that (1) socio-economic drivers have favoured land cover changes contributing to increasing fire hazard in the last decades, (2) large wildfires are becoming more frequent, (3) increased fire frequency is promoting homogeneous landscapes covered by fire-prone shrublands; (4) landscape planning to reduce fuel loads may be successful only if fire weather conditions are not extreme. The challenges to address these problems and the policy and landscape management responses that should be adopted are discussed, along with the major knowledge gaps.

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Influence of landscape complexity and land management on woody plant diversity in northern Spain

Cited by 60 publications

References 52 publications

Molecular characterization of microbial communities in the rhizosphere soils and roots of diseased and healthy Panax notoginseng

Molecular characterization of microbial communities in the rhizosphere soils and roots of diseased and healthy Panax notoginseng

Woody species diversity and forest structure from lowland to montane forest in Hyrcanian forest ecoregion

Landscape – wildfire interactions in southern Europe: Implications for landscape management

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