Coelomactra antiquata is an important aquatic economic shellfish with high medicinal value. However, because C. antiquata has no reference genome, a lot of molecular biology research cannot be carried out, so the analysis of its transcripts is an important step to study the regulatory genes of various substances in C. antiquata. In the present study, we conducted the first full-length transcriptome analysis of C. antiquata by using PacBio single-molecule real-time (SMRT) sequencing technology. The results identified a total of 39,209 unigenes with an average length of 2,732 bp, 23,338 CDSs, 251 AS events, 9,881 lncRNAs, 20,106 SSRs, and 2,316 TFs. Subsequently, 59.22% (23,220) of the unigenes were successfully annotated, of which 23,164, 18,711, 15,840, 13,534, and 13,474 unigenes could be annotated using NR, Swiss-prot, KOG, GO, and KEGG databases, respectively. This study lays the foundation for the follow-up research of molecular biology and provides a reference for studying the more medicinal value of C. antiquata.

The Pacific whiteleg shrimp (Penaeus vannamei, synonym Lipopenaeus vannamei) is an important aquaculture species, and its breeding improvement relies heavily on high-quality genomic resources. Here, we sequenced the genome of the Pacific whiteleg shrimp using PacBio and Hi-C technologies, resulting in a 1.7 Gb genome assembly with a Contig N50 of 57.65Kb and a Scaffold N50 of 605Kb.BUSCO analysis indicated that our genome assembly achieved a gene coverage of 84.6%, a figure considered high among crustacean reference genomes. In total, 907,237,377 bp of repetitive sequences (accounting for 50.48% of the assembled genome) and 22,923 protein-coding genes were identified. Utilizing Hi-C technology, we anchored 14,604 contigs onto 44 chromosomes, yielding a chromosome-level genome assembly with a contig N50 of 42,894,961 bp. In summary, our high-quality genome assembly provides valuable reference genomic resources for the improvement and breeding of elite cultivars of the Pacific whiteleg shrimp.

Mangroves, as a salt-tolerant evergreen broad-leaved vegetation ecosystem, are widely distributed along the coastlines of tropical and subtropical regions. In the field of ecology, scholars generally agree that climatic drivers, particularly temperature and precipitation patterns, play a crucial role in regulating the global distribution, structure, and functions of mangroves. However, there are still significant challenges in research exploring the relationship between climate and mangrove distribution. This study focused on two dominant mangrove species in the northern margin of the South China Sea: Kandelia obovata and Avicennia marina. By compiling reported data, utilizing database information, and integrating our field observations, we employed species distribution models to simulate the distribution areas of these two species and their habitat changes under global warming scenarios. Our results indicate that bio18 serves as the primary climatic factor shaping their distribution patterns. Specifically, K. obovata is primarily distributed in the Northern Hemisphere, while A. Marina exhibits a much broader distribution range, encompassing over 40 times the area of K. obovata. The niche overlap between these two species is relatively low, and global warming is further promoting the separation of their niches. Notably, the continued warming of the climate in the future is not expected to pose a significant threat to K. obovata. However, it significantly increases the risk of habitat loss for A. marina. This study underscores the urgent need to implement conservation measures for mangrove ecosystems, with particular priority given to those species that are currently experiencing or are vulnerable to habitat loss.