Increasing temperature and changing land-use in the Guayana Shield and Amazonia result in an accelerated decline of sensitive lichen populations. Monitoring of these populations by biological plot inventories in particularly vulnerable sites is urgently needed. In order to know the diversity and distribution of lichen species at the Alto Orinoco. Parque Nacional Duida-Marahuaca and ne... https://www.poolsproductscanadas.shop/product-category/hayward-hcp-4000-series-parts/