Anthropogenic Impacts on Coral-Algal Interactions of the Subtropical Lagoonal Reef, Norfolk Island

Integrative Organismal Biology, Journal Year: 2025, Volume and Issue: 7(1)

Published: Jan. 1, 2025

Synopsis Reef building corals are important in subtropical marine ecoregions, shaping ecosystems and providing habitats for fish benthic species. Algal communities contribute substantially to the population structure across coral reefs, however increasing algal cover on reefs is also linked degraded as has been shown tropical systems. As such, dynamics of coral-algal interactions likely be an indicator ecosystem health ecosystems. The lagoonal reef Norfolk Island within Marine Park impacted by a regime disturbance since 2020 including flooding, sedimentation, heat stress events. Assessing type extent with dominant Pocillopora damiconis sites Emily Bay, Slaughter Cemetery Bay potential provide insight into drivers decline reef. Similarly, photochemical efficiency, measured yield (Fv/Fm) using pulse amplitude modulated fluorometry, can used measure during degradation Here we assess colonies P. damicornis prior onset summertime conditions (April 2023) (December 2023). Seasonal site were evident significant bloom red cyanobacteria (P < 0.0001, April Lyngbya {P 0.01 [Slaughter West (SBW)], P East (SBE)], December 2023}. Within reef, variability was most Lyngbya, damincornis found significantly higher at slaughter bay west (SBW 30.2% interactions) east (SBE 24.6% 2023 than neighboring (11.6% (0.6% interactions). Pulse Amplitude Modulated (PAM) fluorometry highlighted influence efficiency damicornis. Benthic structure, interactions, lagoonal, both highlight anthropogenic ecosystem. Further investigation therefore necessary elucidate specific causes consequences algae poor water quality, such interacting corals.

Language: Английский

---

Use of stable isotopic signatures and fatty acid profiles to authenticate Chinese mitten crab (Eriocheir sinensis) reared in ponds and rice fields

Food Control, Journal Year: 2025, Volume and Issue: unknown, P. 111253 - 111253

Published: Feb. 1, 2025

Language: Английский

---

Seagrasses produce most of the soil blue carbon in three Maldivian islands

Frontiers in Marine Science, Journal Year: 2024, Volume and Issue: 11

Published: March 6, 2024

Blue carbon is fast garnering international interest for its disproportionate contribution to global stocks. However, our understanding of the size these blue stocks, as well provenance that stored within them, still poor. This especially pertinent many small-island nations may have substantial ecosystems are poorly studied. Here, we present a preliminary assessment from three islands in Maldives. The higher purpose this research was assess feasibility using help offset emissions associated with Maldivian tourism, largest industry one highest destination-based footprints, globally. We used stable isotope mixing models identify how habitats contributed found sediments, and Loss on Ignition (LoI) determine content. surveyed islands, seagrasses ( Thalassia hemprichii, Thalassodendron ciliatum, Halodule pinofilia, Syringodium isoetifolium , Cymodocea rotundata ) were main contributors sediment (55 – 72%) while mangroves had lowest (9 44%). Surprisingly, screw pine Pandanus spp.), relative palm trees across over quarter sediments. Organic content (‘blue carbon’) 6.8 ± 0.3 SE % 393 29 tonnes ha -1 mangrove soils, 2.5 0.2% 167 20 seagrasses, which slightly than averages. While preliminary, results highlight importance sources ecosystems, possible role palms such pines supplementing this. Further needed to: 1) map current ecosystem extent opportunities additionality through conservation restoration; 2) sequestration rates; 3) investigate options tourism-related crediting. Overall, opportunity Maldives promising, but state knowledge very limited.

Language: Английский

---

Colonial Ascidian Populations at Inshore Coral Reefs of Norfolk Island, South Pacific

Diversity, Journal Year: 2024, Volume and Issue: 16(7), P. 384 - 384

Published: June 30, 2024

Subtropical coral reefs such as the lagoonal of Norfolk Island in remote South Pacific are vastly understudied, with many benthic species unrecorded scientific literature. Here we report on ascidian populations from 2021 to 2023 at Islands inshore reefs. Quantitative assessments spanning that period were conducted assess presence, cover, and interactions. We show cover remained persistently low stable across during study period. find adjacent reef site, Cemetery Bay showed variation over time, where measure a 3.2-fold increase 2 years. Ascidians associated primarily sand sediment substrates all locations. Recorded interactions between hard corals ascidians low. This provides valuable insights into population dynamics within subtropical ecosystems. Ongoing monitoring can provide comprehensive understanding whilst also providing insight theimpact anthropogenic stressors communities. Together, this aid informing management conservation strategies for

Language: Английский

---

A spatio-temporal assessment of seawater quality in Miri-Sibuti Coral Reef: Evaluating for metal pollution, sources and dynamics

Regional Studies in Marine Science, Journal Year: 2024, Volume and Issue: 80, P. 103903 - 103903

Published: Nov. 9, 2024

Language: Английский

---