Pierre William Froneman

Oxidative stress, neurotoxicity, and immune responses in juvenile Sobaity seabream ( Sparidentex hasta ) following waterborne selenium exposure

Mohammad Monjezi Veisi, Khor Waiho, Pierre William Froneman

Abstract Selenium (Se) is a crucial element involved in various physiological processes and is essential for maintaining an active endogenous anti-oxidant system. This study aimed to examine the effects of different Se concentrations on oxidative stress, neurotoxicity, and immunity in juvenile Sobaity …

cn, my, Afrique du Sud (code pays fourni par la source)

Feeding down the food web?! Trophic cascading reflected in the long-term dietary trends of endangered Indian Ocean humpback dolphins Sousa plumbea from KwaZulu-Natal, South Africa

Natasha Roussouw, Pierre William Froneman, Kay Weltz, Kirsty Venter et autres

• Sousa plumbea is a good indicator species for the coastal zone of the Indian Ocean. • A multi-method approach investigated long-term dietary trends (1972–2017). • Stomach contents and δ 13 C isotope signatures showed a diet shift over time. • Significant …

de, Afrique du Sud (code pays fourni par la source)

Unravelling the Role of Predator Diversity in Shaping Plankton Dynamics: Evidence from a Mesocosm Study

Robyn Fabian, Pierre William Froneman

Predation plays a key organizational role in structuring plankton communities. However, predator diversity can lead to emergent effects in which the outcomes of predator–prey interactions are modified. The response of the plankton community to three different predator regimes at natural densities was …

Afrique du Sud (code pays fourni par la source)

Sand Prawns Mitigate the Impact of Prolonged Drought on the Biology of a Temporary Open/Closed Estuary

Celiwe Yekani, Pierre William Froneman

The role of the sand prawn, Kraussillichirus kraussi (Stebbing, 1900), as an ecosystem engineer was evaluated through a two-and-a-half-month caging experiment conducted during a prolonged drought in the lower reaches of the temporarily open/closed Kasouga Estuary along South Africa’s eastern seaboard. Findings …

Afrique du Sud (code pays fourni par la source)

First record of pyroplastic and partially burnt plastic litter along South African shores

Gerardo I. Zardi, Pierre William Froneman, Katy R. Nicastro

As plastic pollution has accumulated in the natural environment over the last half-century, so too has the body of literature on plastic contamination assessment. Despite this growing research, new, and cryptic forms of plastic debris continue to emerge, with limited data on …

fr, ca, Afrique du Sud (code pays fourni par la source)

The Cat's Whiskers: Stable Isotopes Reveal Individual Specialisation of Adaptable Caracals (Caracal caracal) Foraging in an Urbanising Landscape

Gabriella R. M. Leighton, Anna R. Brooke, Pierre William Froneman, Laurel E. K. Serieys et autres

ABSTRACT Urbanisation critically alters the availability of resources and the nature of risks for wildlife by fragmenting natural habitats and disrupting ecosystems. Despite these challenges, carnivores frequently persist in and around urban environments, where novel opportunities, such as anthropogenic food, may outweigh …

Afrique du Sud (code pays fourni par la source)

Invasive Aquatic Weeds Suppress Predator–Prey Cascades: Evidence from a Mesocosm Study

Pierre William Froneman

Submerged macrophytes can profoundly influence interactions between aquatic predators and their prey due to changes in foraging efficiencies, pursuit time and swimming behaviors of predator–prey participants. Water hyacinth, Eichhornia crassipes (Mart.) Solms-Laub. (Pontederiaceae), is the most widely distributed of the aquatic invasive …

Afrique du Sud (code pays fourni par la source)

Biogeography, not intraspecific trait variation, determines macrofaunal communities associated with mussel beds

AM Dievart, Christopher David McQuaid, Gerardo I. Zardi, Katy R. Nicastro et autres

Intraspecific trait variation, whether phenotypic or due to genotypic differences, can influence ecosystem functioning, especially in the case of ecosystem engineering species. Here, we investigated a coastal ecosystem dominated by 2 distinct genetic lineages of the native brown mussel Perna perna in …

Afrique du Sud, fr, pt (code pays fourni par la source)

Sand Prawns Mitigate the Impact of Prolonged Drought on the Biology of a Temporary Open/Closed Estuary

Celiwe Yekani, Pierre William Froneman

The role of the sand prawn, Callichirus kraussi (Stebbing, 1900), as an ecosystem engineer was evaluated using a three-month-long caging experiment during a prolonged drought in the lower reaches of the temporarily open/closed Kasouga Estuary along the eastern seaboard of South Af-rica. …

Afrique du Sud (code pays fourni par la source)

Locality-based community science facilitates early detection and monitoring: the case of an extralimital population of a brachyuran crab

Pierre William Froneman, Francesca Porri, Christopher David McQuaid

Practitioners of community science who are based at a locality and who are familiar with the local ecosystem can provide opportunities to supplement formal monitoring efforts.Between 2021 and 2023, we established a working relationship with a yearround resident recreational fisher who was …

ca, Afrique du Sud (code pays fourni par la source)

The use of gabions as an eco-engineering approach to enhance estuarine fish habitats in urbanised waterways

Jessica Seath, Louise B. Firth, Pierre William Froneman, Louw Claassens

Afrique du Sud, ie, gb, my (code pays fourni par la source)

Leachates from pyroplastics alter the behaviour of a key ecosystem engineer

Gerardo I. Zardi, Laurent Seuront, Nicolas Spilmont, Pierre William Froneman et autres

As plastic pollution is increasing rapidly, novel forms of plastic litter have been lately described. One of most recently described type of plastic litter is pyroplastic, i.e. an amorphous matrix derived from the burning of manufactured plastics. We surveyed 12 locations along …

fr, Afrique du Sud, pt, jp (code pays fourni par la source)