Banca de DEFESA: PEDRO PAULO SOUZA LOPES

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : PEDRO PAULO SOUZA LOPES
DATE: 02/03/2026
TIME: 08:30
LOCAL: SALA DE REUNIÕES DO DECOL/CB/UFRN e Google Meet (https://meet.google.com/dxa-pspc-drn)
TITLE:

Disentangling species-area relationships of aquatic invertebrates in non-perennial rivers: a macroecological approach

 

KEY WORDS:

Metacommunities; Land use and land cover; Flow intermittence; Species abundance distribution; Intraspecific aggregation; Scale-dependent effects

 

PAGES: 46
BIG AREA: Ciências Biológicas
AREA: Ecologia
SUMMARY:

Globally, rivers are facing rapid biodiversity loss due to human impacts, such as land cover conversion and increased flow intermittence associated with climate change. However, the effect of these stressors on river ecosystems are often scale-dependent, which can generate controversy among studies conducted at different spatial scales. Thus, the Species-Area Relationship (SAR) is a powerful tool to investigate scale-dependent effects of stressors on biodiversity. Here, we investigate whether, how, and through which metacommunity properties (intraspecific aggregation, species abundance distribution, number of individuals, and regional species pool) land use and land cover change and flow intermittence bend the shape of the SAR in river invertebrate metacommunities. To test our hypotheses, we used a large database of southeastern France containing 48 metacommunities. Our results indicate that flow intermittence reduces the intercept and increases the slope of SAR by increasing intraspecific aggregation and reducing metacommunities evenness. Urbanization, in turn, reduces the intercept by decreasing both species evenness and gamma diversity, resulting in a consistent loss of biodiversity across multiple scales. Extensive agriculture was associated with increases in both SAR parameters through an increase in gamma diversity, although the mechanisms underlying this pattern were not directly evaluated in this study. Our results highlight the need for tailored conservation strategies to protect and restore riverine ecosystems composed of non-perennial reaches in the face of global change while considering multiple spatial scales. 

COMMITTEE MEMBERS:
Interno - 1714892 - ADRIANO CALIMAN FERREIRA DA SILVA
Presidente - 3060333 - ANDROS TAROUCO GIANUCA
Externa à Instituição - CARLA FERREIRA REZENDE - UFC