Girişimciliğin ilk aşamasında finansman temin yolları ve finansman temininde karşılaşılan sorunlar: Gaziantep ilinde bir uygulama

Bugün işletmeler gelişen dünya pazarlarında rekabette bulunarak ekonomik ve finansal açıdan avantaj sağlamaktadırlar. İşletmeler, girişimcilerin temel özellikleri ile teknolojiyi kullanan ve geliştiren işletmeler olarak ülkelerin kalkınmasında önemli rol oynamaktadır. Teknolojik yeniliklerin yanında inovasyona da yatırım yaparak gelişimlerini tamamlarlar. Ancak her alanda olduğu gibi, girişimciler finansal açıdan da sorunlarla karşılaşmaktadırlar. Dolayısıyla işletme sayısının artarak ülkeye katkıda bulunabilmesi için finansman teminindeki sorunları farklı olan girişimcilerin desteklenmeleri ve yönlendirilmeleri gerekmektedir. Bu noktada, girişimcileri desteklemek amacıyla kamu kurum ve kuruluşları ve diğer kuruluşlar faaliyetlerini sürdürmektedir. Bu araştırmanın temel amacı, girişimciliğin ilk aşamasında finans temin yollarının belirlenerek finansman temin yönteminde karşılaşılan sorunları ortaya koymaktır. Bununla birlikte, bu çalışmada Türkiye’de girişimciliğin temel özellikleri, girişimcilik finansman türleri ve finansman temininde karşılaşılan sorunlara yönelik önerilerin sunulması amaçlanmaktadır. Araştırma kapsamında nitel ve nicel araştırma yöntemleri uygulanmıştır. Nicel araştırma kapsamında, 408 girişimciye anket uygulanmış, nitel araştırma kapsamında ise 180 girişimciyle yüz yüze görüşmeler yapılmıştır. Araştırma yöntemlerinden elde edilen veriler, çeşitli istatistiksel analizlere tabi tutulmuştur. Girişimciliğin ilk aşamasında, girişimcilerin finansman temininde karşılaştıkları sorunlar belirlenerek, bu sorunlara yönelik çözüm önerilerinde bulunulmuştur. Bu araştırmanın sonucunda, girişimciliğin ilk aşamasında, girişimcilerin finansman temin yöntemi konusunda yeterli derecede bilgi sahibi olmadıkları ve kendi kaynaklarını daha çok kullandıkları tespit edilmiştir

The relative effects of upwelling and river flow on the phytoplankton diversity patterns in the ria of A Coruña (NW Spain)

Phytoplankton species assemblages in estuaries are connected to those in rivers and marine environments by local hydrodynamics leading to a continuous flow of taxa. This study revealed differential effects of upwelling and river flow on phytoplankton communities observed in 2011 along a salinity gradient from a river reservoir connected to the sea through a ria-marine bay system in A Coruña (NW Spain, 43° 16-21’ N, 8° 16-22’ W). With 130 phytoplankton taxa identified, the assemblages were dominated in general by diatoms, particularly abundant in the bay and in the estuary, but also by chlorophycea and cyanobacteria in the reservoir. Considering the entire seasonal cycle, the local assemblages were mainly characterized by changes in cryptophytes and diatoms, small dinoflagellates and some freshwater chlorophycea. Salinity, nitrate, and organic matter variables, were the main environmental factors related to the changes in the phytoplankton communities through the system, while phosphate and nitrite were also important for local communities in the estuary and the bay, respectively. The corresponding local phytoplankton assemblages showed moderate levels of connectivity. The estuarine community shared a variable number of taxa with the adjacent zones, depending on the relative strength of upwelling (major influence from the bay) and river flow (major influence of the reservoir) but had on average 35% of unique taxa. Consequently, local and zonal diversity patterns varied seasonally and were not simply related to the salinity gradient driven by the river flow.ANILE (CTM2009-08396 and CTM2010-08804-E), FIOME (CTM2011-28792-C02-01-MAR), and MEFIO (CTM2011-28792-C02-02-MAR) of the Plan Nacional de I+D+i (Spain), and RADIALES of the Instituto Español de Oceanografía (IEO, Spain).Versión del editor2,01

Primary production, an index of climate change in the ocean: Satellite-based estimates over two decades

© 2020 by the authors. Primary production by marine phytoplankton is one of the largest fluxes of carbon on our planet. In the past few decades, considerable progress has been made in estimating global primary production at high spatial and temporal scales by combining in situ measurements of primary production with remote-sensing observations of phytoplankton biomass. One of the major challenges in this approach lies in the assignment of the appropriate model parameters that define the photosynthetic response of phytoplankton to the light field. In the present study, a global database of in situ measurements of photosynthesis versus irradiance (P-I) parameters and a 20-year record of climate quality satellite observations were used to assess global primary production and its variability with seasons and locations as well as between years. In addition, the sensitivity of the computed primary production to potential changes in the photosynthetic response of phytoplankton cells under changing environmental conditions was investigated. Global annual primary production varied from 38.8 to 42.1 Gt C yr-1 over the period of 1998-2018. Inter-annual changes in global primary production did not follow a linear trend, and regional differences in the magnitude and direction of change in primary production were observed. Trends in primary production followed directly from changes in chlorophyll-a and were related to changes in the physico-chemical conditions of the water column due to inter-annual and multidecadal climate oscillations. Moreover, the sensitivity analysis in which P-I parameters were adjusted by ±1 standard deviation showed the importance of accurately assigning photosynthetic parameters in global and regional calculations of primary production. The assimilation number of the P-I curve showed strong relationships with environmental variables such as temperature and had a practically one-to-one relationship with the magnitude of change in primary production. In the future, such empirical relationships could potentially be used for a more dynamic assignment of photosynthetic rates in the estimation of global primary production. Relationships between the initial slope of the P-I curve and environmental variables were more elusive

Role of across-shelf currents in the dynamics of harmful dinoflagellate blooms in the northwestern Iberian upwelling

11 pages, 9 figures, 1 tableHarmful dinoflagellate blooms are frequent in the Rías Baixas, which are made up of four open bays on the northwest part of the Iberian Peninsula. The relationship between surface currents resulting from wind forcing and the microplankton composition on the shelf offshore of the Rías Baixas was studied from May 2001 to April 2002. The aim was to assess the role of shelf currents in the dynamics of harmful dinoflagellate blooms in the Rías Baixas shelf system. In summer, upwelling-favorable northerly winds forced a variable but persistent southwestward flow on the shelf, which reverted to an onshore flow following the change to downwellingfavorable southwesterly winds in autumn. During winter and spring, there was an intense alongshore flow to the north. Diatoms and dinoflagellates were common components of the microplankton community in summer. Although diatoms increased their abundance during summer upwelling events, a dinoflagellate assemblage was also present on the shelf. This dinoflagellate assemblage acquired higher importance during the intermediate periods of upwelling relaxation and during the autumn downwelling in particular, when satellite images revealed the accumulation of phytoplankton in a narrow band close to the coast. A dinoflagellate bloom of Prorocentrum minimum (10,564 cells mL−1) and Karenia cf. mikimotoi (3,022 cells mL−1) developed in the interior section of the Ría de Vigo coincident with the onshore flow imposed by the autumn downwelling. As these two species were components of the dinoflagellate assemblage present on the shelf in summer, it is inferred that downwelling caused their accumulation in the interior section of the Ría de VigoThis work was funded by the Spanish DYBAGA project (MAR99-1039-C02-01) and the EU HABILE project (EVK3-CT-2001-00063). B.G.C. was supported by a CSIC-ESF I3P fellowshipPeer reviewe