Mark Ladd results 21
· Newest (Page 1/1, per page 25)
Author: Mark Ladd ×Clear All Filters
Search Results
The abundance, formation, and persistence of long sediment-laden algal turfs on Florida’s coral reefOA Marine
Over recent decades, coral reefs worldwide have experienced substantial declines in coral cover as a result of interacting global and local stressors. On Florida’s coral reef, coral cover has declined by over 70%, in recent decades, coinciding with pronounced shifts in benthic community composition. One increasingly common feature of these reefs is long sediment-laden algal turfs (LSATs), which form a turf–sediment matrix that...
The rise of long-sediment-laden algal turfs: an additional negative feedback process limiting reef resilienceNARA Subscribed
In an era of increasing disturbances, understanding the capacity for coral reefs to recover and the drivers that underpin resilience is critical for predicting the health of future coral reefs. Traditional resilience paradigms for Western Atlantic reefs suggest that high herbivore biomass and low macroalgal cover are tenets of resilient systems. Yet, it is clear that some locations, such as Florida’s reefs, and potentially oth...
Success of restoration strategies in preventing extirpation of 2 critically endangered coral speciesNARA Subscribed
An unprecedented marine heatwave in 2023 caused widespread coral bleaching and mortality throughout the Caribbean. In the Florida Keys (USA), 2 foundation species, elkhorn coral ( Acropora palmata ) and staghorn coral ( Acropora cervicornis ), were severely affected. These species have been the primary focus of reef restoration in Florida for decades. Substantial losses of these species occurred in outplanted populations, in o...
To assess the long-term impact of climate change and human influence on lakes and their sedimentary carbon storage, paleo-environmental approaches using well-dated lake sediment cores can be employed. Here, we reconstruct carbon mass accumulation rates for organic and inorganic carbon since 13 ka BP in Rotsee, a perialpine lake near the Swiss Alps, using a 12-m sediment core. A multiproxy approach (XRF, carbon and nitrogen iso...
Here, we provide the first reports of spawning activity by Acropora palmata colonies outplanted to reefs in Florida, USA. In 2020, we observed light spawning from A. palmata colonies five years after they had been outplanted on two Florida reefs. In 2021 and 2022, we observed outplanted A. palmata colonies spawning synchronously with other nearby (<3 m) outplants and wild colonies more than 100 m away. During the 2022 spawning...
Conservation biology emerged as a crisis discipline in the twentieth century amongst an increasing awareness of pollution and habitat loss. Since the early 2000s, societal and monetary benefits of nature were added to the narrative for biodiversity conservation. Using text mining, we show that authors now favour ecosystem-services over a crisis framing in scientific publications on coastal habitats. This may signal a shift in...
Positive interactions between corals and damselfish increase coral resistance to temperature stressNARA Subscribed
By the century's end, many tropical seas will reach temperatures exceeding most coral species' thermal tolerance on an annual basis. The persistence of corals in these regions will, therefore, depend on their abilities to tolerate recurrent thermal stress. Although ecologists have long recognized that positive interspecific interactions can ameliorate environmental stress to expand the realized niche of plants and animals, cor...
Priority effects in coral–macroalgae interactions can drive alternate community paths in the absence of top‐down controlNARA Subscribed
The outcomes of species interactions can vary greatly in time and space with the outcomes of some interactions determined by priority effects. On coral reefs, benthic algae rapidly colonize disturbed substrate. In the absence of top‐down control from herbivorous fishes, these algae can inhibit the recruitment of reef‐building corals, leading to a persistent phase shift to a macroalgae‐dominated state. Yet, corals may also inhi...
Previous1Next