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\"How are China's ongoing sovereignty disputes in the East and South China Seas likely to evolve? Are relations across the Taiwan Strait poised to enter a new period of relaxation or tension? How are economic interdependence, domestic public opinion, and the deterrence role played by the US likely to affect China's relations with its counterparts in these disputes? Although territorial disputes have been the leading cause for interstate wars in the past, China has settled most of its land borders with its neighbours. Its maritime boundaries, however, have remained contentious. This book examines China's conduct in these maritime disputes in order to analyse Beijing's foreign policy intentions in general. Rather than studying Chinese motives in isolation, Steve Chan uses recent theoretical and empirical insights from international relations research to analyse China's management of its maritime disputes\"-- Provided by publisher.

The occurrences of harmful algal blooms (HABs), in terms of frequency and area in the Chinese coastal waters, have been increasing since 1980s and caused considerable economic losses. In the present study, we have analyzed spatial and seasonal characteristics of HAB events in the southern Yellow Sea and East China Sea along Chinese coast from 1933 to 2004. With a total 435 HAB records, the most frequent HAB occurrence area (FHA) is off the Yangtze River mouth and another two FHA areas are located south of the Yangtze River estuary along about isobaths of 30–60 m coastal water in the East China Sea. The time of HAB occurrence shifted during our study period: from autumn (August–October) before 1980s to July–August in 1980s, during May–July in 1990s, and May–June for the period of 2000–2004. Causative species were found to be different: Noctiluca scintillans and Skeletonema costatum were dominant causative species prior to 2000; and Prorocentrum donghaiense Lu was dominant from 2000 to 2004 and also caused large blooms in May. Trichodesmium sp. caused many HABs in autumn (August–October) prior to 1980s with only one HAB between 1980 and 2004. The changes of the dominant HAB species may have affected the timings of HAB occurrence, as well as the increasing HAB-affected areas in recent years.

\"This book analyses China's maritime strategy for the 21st century, integrating strategic planning, policy thinking and strategic prediction. This book explains the construction and application of China's military, political, economic and diplomatic means for building maritime power, and predicts the future of China's maritime power by 2049, as well as development trends in global maritime politics. It explores both the strengths and the limitations of President Xi's 'Maritime Dream' and provides a candid assessment of the likely future balance at sea between China and the United States. This volume explains and discusses China's claims and intentions in the East and South China Seas and makes some recommendations for China's future policy that will lessen the chance of conflict with the United States and its closer neighbours. This book will be of much interest to students of maritime strategy, naval studies, Chinese politics and International Relations in general\"-- Provided by publisher.

Harmful blooms of Prorocentrum donghaiense occur annually in the phosphorus-scarce coastal waters of the East China Sea (ECS). The enzymatic activities of alkaline phosphatase (AP) and its regulation by external phosphorus were studied during a P. donghaiense bloom in this area. The AP characteristics of P. donghaiense was further compared with Prorocentrum minimum and Prorocentrum micans in monocultures with both bulk and single-cell enzyme-labeled fluorescence AP assays. Concentrations of dissolved inorganic phosphorus (DIP) varied between 0.04 and 0.73 µmol l⁻¹, with more than half recording stations registering concentrations below 0.10 µmol l⁻¹. Concentrations of dissolved organic phosphorus (DOP) were comparable or even higher than those of DIP. P. donghaiense suffered phosphorus stress and expressed abundant AP, especially when DIP was lower than 0.10 µmol l⁻¹. The AP activities showed a negative correlation with DIP but a positive correlation with DOP. The AP activities were also regulated by internal phosphorus pool. The sharp increase in AP activities was observed until cellular phosphorus was exhausted. Most AP of P. donghaiense was located on the cell surface and some were released into the water with time. Compared with P. minimum and P. micans, P. donghaiense showed a higher AP affinity for organic phosphorus substrates, a more efficient and energy-saving AP expression quantity as a response to phosphorus deficiency. The unique AP characteristic of P. donghaiense suggests that it benefits from the efficient utilization of DOP, and outcompete other species in the phosphorus-scarce ECS.

The golden cuttlefish (Sepia esculenta) is an important cephalopod species with a lifespan of approximately one year. The species plays a crucial role in marine ecological support services and is commercially valuable in fisheries. In the seas around China, this species has emerged as the main target for cuttlefish fisheries, replacing Sepiella maindroni since the 1990s. Variations in oceanographic conditions associated with global warming could significantly impact the temporal-spatial distribution of the species. In this study, we performed bottom trawling surveys with four cruises during 2018–2019 in the East China Sea region to determine the current resource status and seasonal-spatial variations in S. esculenta. We found that the average individual weight (AIW) values were 4.87 and 519.00 g/ind at stations located at 30.50° N, 124.00° E and 30.50° N, 124.50° E, respectively, with the aggregation of larvae and parent groups in spring. The species was not distributed north of 32.00° N in summer. The catch per unit effort by weight (CPUEw) value decreased in the order of 2772.50→2575.20→503.29→124.36 g/h, corresponding to latitudes of 34.50° N→34.00° N→33.50° N→32.50° N 121.50° E in autumn. The most suitable fishing areas were the south of the East China Sea region in spring; the south of the East China Sea region extending to the center and outer parts of the East China Sea region in summer; the south of the Yellow Sea close to the Haizhou Bay fishing ground and the forbidden fishing line region of the Lusi and Dasha fishing grounds in autumn; and the south and center of the East China Sea region in winter. The most suitable sea bottom temperature (SBT) values from spring to winter were 14.76–20.53 °C, 19.54–22.98 °C, 11.79–17.64 °C, and 16.94–20.36 °C, respectively. The most suitable sea bottom salinity (SBS) values were 31.53–34.80‰ in spring, 32.95–34.68‰ in summer, 31.51–34.77‰ in autumn, and 33.82–34.51‰ in winter. We concluded the following: (1) the southern and northern areas of the East China Sea region are spawning and nursery grounds, respectively, in spring; (2) the central distribution is located at a latitude of 28.00° N in autumn and winter; and (3) the southern area of the Yangtze River to the north is a spawning ground in spring, and the areas located at 29.00–34.50° N, 124.00–124.50° E, and 28.00–30.50° N, 125.50–126.50° E are nursery grounds. The results of this study provide useful guidance for appropriate fisheries management, thereby avoiding a collapse in the S. esculenta population, which has been experienced in other species in this area.

Recently, Harpadon nehereus (Bombay duck) has become one of the most important economic fishes in the East China Sea. Understanding the population growth and fishery exploited status of H. nehereus is of great significance for improving its biological knowledge and exploring the driving factors of population expansion in the East China Sea. Based on the fishery survey data and the fishery statistics in the Northern East China Sea, the growth curve of H. nehereus was fitted with the von-Bertalanffy growth equation. The results showed that the asymptotic total length, the growth coefficient, and the theoretical age at zero length were 319 mm, 1.25 year−1, and − 0.11 year, respectively. LBB model, CMSY model, and BSM model were used to evaluate the exploitation status of the H. nehereus population. The results showed that the H. nehereus population was still healthy, and the Schaefer model showed that the resource will recover rapidly after reducing the fishing intensity. These results illustrated that the fast growth rate, short generation time, and strong interspecific competitiveness and environmental adaptability of the H. nehereus population in the East China Sea were the main reasons that lead to the stable fishery status and the increase of the catches.

\"The Zheng family of merchants and militarists emerged from the tumultuous seventeenth century amid a severe economic depression, a harrowing dynastic transition from the ethnic Chinese Ming to the Manchu Qing, and the first wave of European expansion into East Asia. Under four generations of leaders over six decades, the Zheng had come to dominate trade across the China Seas. Their average annual earnings matched, and at times exceeded, those of their fiercest rivals: the Dutch East India Company. Although nominally loyal to the Ming in its doomed struggle against the Manchus, the Zheng eventually forged an autonomous territorial state based on Taiwan with the potential to encompass the family's entire economic sphere of influence. Through the story of the Zheng, Xing Hang provides a fresh perspective on the economic divergence of early modern China from western Europe, its twenty-first-century resurgence, and the meaning of a Chinese identity outside China\"-- Provided by publisher.

The Changjiang estuary and the coastal area of the East China Sea (ECS) represent important interfaces of terrestrial and marine environments. This study included analyses of water and sediments collected during different seasons in these regions to determine the composition of microbial assemblages by means of 16S rRNA gene clone libraries. We retrieved 1946 sequences and 779 distinct operational taxonomic units from 36 clone libraries. Shannon-Weaver diversity index values and rarefaction analysis indicated that bacterial diversity in the sediment samples was much higher than in the water samples. Proteobacteria (72.9%) was the most abundant phylum, followed by Firmicutes (6.4%), Bacteroidetes (4.6%) and Actinobacteria (4.1%). In the water, clone sequences related to Alphaproteobacteria were the most abundant, whereas in the sediment samples, sequences affiliated with Gammaproteobacteria were predominant. Principal coordinate analysis showed that water samples collected from the Changjiang estuary and the ECS clustered separately. However, this spatial pattern could not be observed in sediment samples, which were mainly distinguished from one another by the season. Bacterial diversity in the Changjiang estuary was higher than that in the ECS, which may be the result of the mixing of bacterial communities from the Changjiang River, the estuary and the coastal ocean.