scholarly journals Nutrient Cycling-Tree Species Relationships in Appalachian Forests

2020 ◽  
Author(s):  
Philip Michael Crim
Keyword(s):  
Nutrient Cycling ◽  
Tree Species ◽  
Species Relationships ◽  
Appalachian Forests

Effects of diversity of tree species on nutrient cycling and soil-related processes

CATENA ◽  
2019 ◽  
Vol 178 ◽  
pp. 335-344 ◽  
Author(s):  
Katayoun Haghverdi ◽  
Yahya Kooch
Keyword(s):  
Nutrient Cycling ◽  
Tree Species

scholarly journals Mineral Types and Tree Species Determine the Functional and Taxonomic Structures of Forest Soil Bacterial Communities

2016 ◽  
Vol 83 (5) ◽  
Author(s):  
Y. Colin ◽  
O. Nicolitch ◽  
M.-P. Turpault ◽  
S. Uroz
Keyword(s):  
Nutrient Cycling ◽  
Incubation Period ◽  
Tree Species ◽  
Bacterial Communities ◽  
Forest Ecosystems ◽  
Mineral Weathering ◽  
Content Type ◽  
Soil Bacterial Communities ◽  
Soil Bacterial ◽  
Mineral Type

ABSTRACT Although minerals represent important soil constituents, their impact on the diversity and structure of soil microbial communities remains poorly documented. In this study, pure mineral particles with various chemistries (i.e., obsidian, apatite, and calcite) were considered. Each mineral type was conditioned in mesh bags and incubated in soil below different tree stands (beech, coppice with standards, and Corsican pine) for 2.5 years to determine the relative impacts of mineralogy and mineral weatherability on the taxonomic and functional diversities of mineral-associated bacterial communities. After this incubation period, the minerals and the surrounding bulk soil were collected to determine mass loss and to perform soil analyses, enzymatic assays, and cultivation-dependent and -independent analyses. Notably, our 16S rRNA gene pyrosequencing analyses revealed that after the 2.5-year incubation period, the mineral-associated bacterial communities strongly differed from those of the surrounding bulk soil for all tree stands considered. When focusing only on minerals, our analyses showed that the bacterial communities associated with calcite, the less recalcitrant mineral type, significantly differed from those that colonized obsidian and apatite minerals. The cultivation-dependent analysis revealed significantly higher abundances of effective mineral-weathering bacteria on the most recalcitrant minerals (i.e., apatite and obsidian). Together, our data showed an enrichment of Betaproteobacteria and effective mineral-weathering bacteria related to the Burkholderia and Collimonas genera on the minerals, suggesting a key role for these taxa in mineral weathering and nutrient cycling in nutrient-poor forest ecosystems. IMPORTANCE Forests are usually developed on nutrient-poor and rocky soils, while nutrient-rich soils have been dedicated to agriculture. In this context, nutrient recycling and nutrient access are key processes in such environments. Deciphering how soil mineralogy influences the diversity, structure, and function of soil bacterial communities in relation to the soil conditions is crucial to better understanding the relative role of the soil bacterial communities in nutrient cycling and plant nutrition in nutrient-poor environments. The present study determined in detail the diversity and structure of bacterial communities associated with different mineral types incubated for 2.5 years in the soil under different tree species using cultivation-dependent and -independent analyses. Our data showed an enrichment of specific bacterial taxa on the minerals, specifically on the most weathered minerals, suggesting that they play key roles in mineral weathering and nutrient cycling in nutrient-poor forest ecosystems.

Nutrient cycling in two continuous cover scenarios for forest conversion of pine plantations on sandy soil. I. Nutrient cycling via aboveground tree biomass

2009 ◽  
Vol 39 (2) ◽  
pp. 441-452 ◽  
Author(s):  
A. De Schrijver ◽  
G. Geudens ◽  
K. Wuyts ◽  
J. Staelens ◽  
L. Gielis ◽  
...  
Keyword(s):  
Nutrient Cycling ◽  
Tree Species ◽  
Pine Plantations ◽  
Nature Management ◽  
Forest Conversion ◽  
Tree Biomass ◽  
Canopy Exchange ◽  
Important Concern ◽  
Continuous Cover Forestry ◽  
Aboveground Tree Biomass

Conversion of coniferous pine plantations into mixed-species forests on sandy soils is an important concern for forest and nature management in Europe. However, little is know of the effect of the applied sylvicultural strategy on biogeochemical cycling throughout the conversion process. This study examined the aboveground biomass production and nutrient (N, P, K, Ca, and Mg) cycling in terms of litterfall, immobilization in stems and branches, canopy exchange, and yearly root uptake in two scenarios of continuous cover forestry a decade after the first intervention for converting a homogeneous Scots pine (Pinus sylvestris L.) forest. Four regeneration types were studied: silver birch (Betula pendula L.) and pine after a shelterwood cutting and birch and pine after a group cutting. In conclusion, it can be stated that both the tree species and the conversion scenario influence the circulation of nutrients through the forest ecosystem: cycling of N, P, and K is determined by the tree species as well as the conversion scenario, whereas circulation of Ca and Mg is predominantly influenced by the type of conversion.

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